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Finding the Fourth Proportional to 642,537.43, 886,706.90 and 356,062.30

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Solution

The fourth proportional to 642,537.43, 886,706.90 and 356,062.30 is: 491,368.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,537.43 : 886,706.90 = 356,062.30 : x
  2. Step 2: Convert to fraction form
    642,537.43/886,706.90 = 356,062.30/x
  3. Step 3: Cross multiply
    642,537.43x = 886,706.90 × 356,062.30
  4. Step 4: Simplify right side
    642,537.43x = 315,722,895,578.03
  5. Step 5: Solve for x
    x = 315,722,895,578.03/642,537.43
  6. Step 6: Final answer
    x = 491,368.88

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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.