Home / 861,414.87-1,291,323.79-381,386.91

Finding the Fourth Proportional to 861,414.87, 1,291,323.79 and 381,386.91

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Solution

The fourth proportional to 861,414.87, 1,291,323.79 and 381,386.91 is: 571,726.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,414.87 : 1,291,323.79 = 381,386.91 : x
  2. Step 2: Convert to fraction form
    861,414.87/1,291,323.79 = 381,386.91/x
  3. Step 3: Cross multiply
    861,414.87x = 1,291,323.79 × 381,386.91
  4. Step 4: Simplify right side
    861,414.87x = 492,493,988,170.65
  5. Step 5: Solve for x
    x = 492,493,988,170.65/861,414.87
  6. Step 6: Final answer
    x = 571,726.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.