Home / 861,326.56-1,291,990.24-387,458.40

Finding the Fourth Proportional to 861,326.56, 1,291,990.24 and 387,458.40

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Solution

The fourth proportional to 861,326.56, 1,291,990.24 and 387,458.40 is: 581,187.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,326.56 : 1,291,990.24 = 387,458.40 : x
  2. Step 2: Convert to fraction form
    861,326.56/1,291,990.24 = 387,458.40/x
  3. Step 3: Cross multiply
    861,326.56x = 1,291,990.24 × 387,458.40
  4. Step 4: Simplify right side
    861,326.56x = 500,592,471,206.02
  5. Step 5: Solve for x
    x = 500,592,471,206.02/861,326.56
  6. Step 6: Final answer
    x = 581,187.78

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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.