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Finding the Fourth Proportional to 431,569.80, 647,354.70 and 151,115.40

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Solution

The fourth proportional to 431,569.80, 647,354.70 and 151,115.40 is: 226,673.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569.80 : 647,354.70 = 151,115.40 : x
  2. Step 2: Convert to fraction form
    431,569.80/647,354.70 = 151,115.40/x
  3. Step 3: Cross multiply
    431,569.80x = 647,354.70 × 151,115.40
  4. Step 4: Simplify right side
    431,569.80x = 97,825,264,432.38
  5. Step 5: Solve for x
    x = 97,825,264,432.38/431,569.80
  6. Step 6: Final answer
    x = 226,673.10

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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.