Home / 814,223.40-1,221,335.10-515,041.80

Finding the Fourth Proportional to 814,223.40, 1,221,335.10 and 515,041.80

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Solution

The fourth proportional to 814,223.40, 1,221,335.10 and 515,041.80 is: 772,562.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,223.40 : 1,221,335.10 = 515,041.80 : x
  2. Step 2: Convert to fraction form
    814,223.40/1,221,335.10 = 515,041.80/x
  3. Step 3: Cross multiply
    814,223.40x = 1,221,335.10 × 515,041.80
  4. Step 4: Simplify right side
    814,223.40x = 629,038,628,307.18
  5. Step 5: Solve for x
    x = 629,038,628,307.18/814,223.40
  6. Step 6: Final answer
    x = 772,562.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.