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Finding the Fourth Proportional to 393,073.28, 542,373.12 and 231,916.16

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Solution

The fourth proportional to 393,073.28, 542,373.12 and 231,916.16 is: 320,004.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,073.28 : 542,373.12 = 231,916.16 : x
  2. Step 2: Convert to fraction form
    393,073.28/542,373.12 = 231,916.16/x
  3. Step 3: Cross multiply
    393,073.28x = 542,373.12 × 231,916.16
  4. Step 4: Simplify right side
    393,073.28x = 125,785,091,277.62
  5. Step 5: Solve for x
    x = 125,785,091,277.62/393,073.28
  6. Step 6: Final answer
    x = 320,004.18

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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.