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Finding the Fourth Proportional to 719,473.92, 992,876.16 and 392,787.48

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Solution

The fourth proportional to 719,473.92, 992,876.16 and 392,787.48 is: 542,047.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,473.92 : 992,876.16 = 392,787.48 : x
  2. Step 2: Convert to fraction form
    719,473.92/992,876.16 = 392,787.48/x
  3. Step 3: Cross multiply
    719,473.92x = 992,876.16 × 392,787.48
  4. Step 4: Simplify right side
    719,473.92x = 389,989,324,838.48
  5. Step 5: Solve for x
    x = 389,989,324,838.48/719,473.92
  6. Step 6: Final answer
    x = 542,047.90

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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.