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Finding the Fourth Proportional to 485,757.20, 730,018.20 and 424,931.60

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Solution

The fourth proportional to 485,757.20, 730,018.20 and 424,931.60 is: 638,606.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,757.20 : 730,018.20 = 424,931.60 : x
  2. Step 2: Convert to fraction form
    485,757.20/730,018.20 = 424,931.60/x
  3. Step 3: Cross multiply
    485,757.20x = 730,018.20 × 424,931.60
  4. Step 4: Simplify right side
    485,757.20x = 310,207,801,755.12
  5. Step 5: Solve for x
    x = 310,207,801,755.12/485,757.20
  6. Step 6: Final answer
    x = 638,606.70

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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.