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Finding the Fourth Proportional to 287,572.10, 431,034.15 and 137,884.10

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Solution

The fourth proportional to 287,572.10, 431,034.15 and 137,884.10 is: 206,670.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,572.10 : 431,034.15 = 137,884.10 : x
  2. Step 2: Convert to fraction form
    287,572.10/431,034.15 = 137,884.10/x
  3. Step 3: Cross multiply
    287,572.10x = 431,034.15 × 137,884.10
  4. Step 4: Simplify right side
    287,572.10x = 59,432,755,842.02
  5. Step 5: Solve for x
    x = 59,432,755,842.02/287,572.10
  6. Step 6: Final answer
    x = 206,670.80

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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.