Home / 1,290,892.92-1,781,406.88-717,920.76

Finding the Fourth Proportional to 1,290,892.92, 1,781,406.88 and 717,920.76

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Solution

The fourth proportional to 1,290,892.92, 1,781,406.88 and 717,920.76 is: 990,716.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,892.92 : 1,781,406.88 = 717,920.76 : x
  2. Step 2: Convert to fraction form
    1,290,892.92/1,781,406.88 = 717,920.76/x
  3. Step 3: Cross multiply
    1,290,892.92x = 1,781,406.88 × 717,920.76
  4. Step 4: Simplify right side
    1,290,892.92x = 1,278,908,981,158.83
  5. Step 5: Solve for x
    x = 1,278,908,981,158.83/1,290,892.92
  6. Step 6: Final answer
    x = 990,716.55

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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.