Home / 639,986.53-883,164.47-353,500.45

Finding the Fourth Proportional to 639,986.53, 883,164.47 and 353,500.45

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Solution

The fourth proportional to 639,986.53, 883,164.47 and 353,500.45 is: 487,821.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,986.53 : 883,164.47 = 353,500.45 : x
  2. Step 2: Convert to fraction form
    639,986.53/883,164.47 = 353,500.45/x
  3. Step 3: Cross multiply
    639,986.53x = 883,164.47 × 353,500.45
  4. Step 4: Simplify right side
    639,986.53x = 312,199,035,801.51
  5. Step 5: Solve for x
    x = 312,199,035,801.51/639,986.53
  6. Step 6: Final answer
    x = 487,821.26

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Double scale
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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.