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Finding the Fourth Proportional to 487,008.40, 730,512.60 and 398,434.90

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Solution

The fourth proportional to 487,008.40, 730,512.60 and 398,434.90 is: 597,652.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,008.40 : 730,512.60 = 398,434.90 : x
  2. Step 2: Convert to fraction form
    487,008.40/730,512.60 = 398,434.90/x
  3. Step 3: Cross multiply
    487,008.40x = 730,512.60 × 398,434.90
  4. Step 4: Simplify right side
    487,008.40x = 291,061,714,729.74
  5. Step 5: Solve for x
    x = 291,061,714,729.74/487,008.40
  6. Step 6: Final answer
    x = 597,652.35

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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.