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Finding the Fourth Proportional to 720,892.59, 994,789.04 and 398,577.39

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Solution

The fourth proportional to 720,892.59, 994,789.04 and 398,577.39 is: 550,013.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,892.59 : 994,789.04 = 398,577.39 : x
  2. Step 2: Convert to fraction form
    720,892.59/994,789.04 = 398,577.39/x
  3. Step 3: Cross multiply
    720,892.59x = 994,789.04 × 398,577.39
  4. Step 4: Simplify right side
    720,892.59x = 396,500,417,170.92
  5. Step 5: Solve for x
    x = 396,500,417,170.92/720,892.59
  6. Step 6: Final answer
    x = 550,013.17

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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.