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Finding the Fourth Proportional to 542,391.29, 748,506.75 and 312,996.18

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Solution

The fourth proportional to 542,391.29, 748,506.75 and 312,996.18 is: 431,938.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,391.29 : 748,506.75 = 312,996.18 : x
  2. Step 2: Convert to fraction form
    542,391.29/748,506.75 = 312,996.18/x
  3. Step 3: Cross multiply
    542,391.29x = 748,506.75 × 312,996.18
  4. Step 4: Simplify right side
    542,391.29x = 234,279,755,087.38
  5. Step 5: Solve for x
    x = 234,279,755,087.38/542,391.29
  6. Step 6: Final answer
    x = 431,938.64

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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.