Home / 861,311.59-1,291,967.79-387,443.32

Finding the Fourth Proportional to 861,311.59, 1,291,967.79 and 387,443.32

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Solution

The fourth proportional to 861,311.59, 1,291,967.79 and 387,443.32 is: 581,165.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,311.59 : 1,291,967.79 = 387,443.32 : x
  2. Step 2: Convert to fraction form
    861,311.59/1,291,967.79 = 387,443.32/x
  3. Step 3: Cross multiply
    861,311.59x = 1,291,967.79 × 387,443.32
  4. Step 4: Simplify right side
    861,311.59x = 500,564,289,890.66
  5. Step 5: Solve for x
    x = 500,564,289,890.66/861,311.59
  6. Step 6: Final answer
    x = 581,165.16

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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.