Home / 783,881,542.71-1,081,205,782.65-515,871,985.14

Finding the Fourth Proportional to 783,881,542.71, 1,081,205,782.65 and 515,871,985.14

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Solution

The fourth proportional to 783,881,542.71, 1,081,205,782.65 and 515,871,985.14 is: 711,540,893.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,881,542.71 : 1,081,205,782.65 = 515,871,985.14 : x
  2. Step 2: Convert to fraction form
    783,881,542.71/1,081,205,782.65 = 515,871,985.14/x
  3. Step 3: Cross multiply
    783,881,542.71x = 1,081,205,782.65 × 515,871,985.14
  4. Step 4: Simplify right side
    783,881,542.71x = 557,763,773,440,502,912
  5. Step 5: Solve for x
    x = 557,763,773,440,502,912/783,881,542.71
  6. Step 6: Final answer
    x = 711,540,893.68

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Half scale
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Double scale
Find fourth proportional to 783,881,543.71, 1,081,205,784.03 and 515,871,986.14
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.