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Finding the Fourth Proportional to 529,132.80, 730,209.91 and 287,419.41

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Solution

The fourth proportional to 529,132.80, 730,209.91 and 287,419.41 is: 396,642.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,132.80 : 730,209.91 = 287,419.41 : x
  2. Step 2: Convert to fraction form
    529,132.80/730,209.91 = 287,419.41/x
  3. Step 3: Cross multiply
    529,132.80x = 730,209.91 × 287,419.41
  4. Step 4: Simplify right side
    529,132.80x = 209,876,504,190.80
  5. Step 5: Solve for x
    x = 209,876,504,190.80/529,132.80
  6. Step 6: Final answer
    x = 396,642.40

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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.