Home / 719,470.92-992,872.01-392,784.45

Finding the Fourth Proportional to 719,470.92, 992,872.01 and 392,784.45

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Solution

The fourth proportional to 719,470.92, 992,872.01 and 392,784.45 is: 542,043.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,470.92 : 992,872.01 = 392,784.45 : x
  2. Step 2: Convert to fraction form
    719,470.92/992,872.01 = 392,784.45/x
  3. Step 3: Cross multiply
    719,470.92x = 992,872.01 × 392,784.45
  4. Step 4: Simplify right side
    719,470.92x = 389,984,679,439.96
  5. Step 5: Solve for x
    x = 389,984,679,439.96/719,470.92
  6. Step 6: Final answer
    x = 542,043.70

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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.