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Finding the Fourth Proportional to 719,425.13, 992,809.05 and 397,134.46

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Solution

The fourth proportional to 719,425.13, 992,809.05 and 397,134.46 is: 548,046.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,425.13 : 992,809.05 = 397,134.46 : x
  2. Step 2: Convert to fraction form
    719,425.13/992,809.05 = 397,134.46/x
  3. Step 3: Cross multiply
    719,425.13x = 992,809.05 × 397,134.46
  4. Step 4: Simplify right side
    719,425.13x = 394,278,680,990.82
  5. Step 5: Solve for x
    x = 394,278,680,990.82/719,425.13
  6. Step 6: Final answer
    x = 548,046.86

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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.