Home / 861,309.59-1,291,964.79-387,441.32

Finding the Fourth Proportional to 861,309.59, 1,291,964.79 and 387,441.32

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Solution

The fourth proportional to 861,309.59, 1,291,964.79 and 387,441.32 is: 581,162.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,309.59 : 1,291,964.79 = 387,441.32 : x
  2. Step 2: Convert to fraction form
    861,309.59/1,291,964.79 = 387,441.32/x
  3. Step 3: Cross multiply
    861,309.59x = 1,291,964.79 × 387,441.32
  4. Step 4: Simplify right side
    861,309.59x = 500,560,543,631.12
  5. Step 5: Solve for x
    x = 500,560,543,631.12/861,309.59
  6. Step 6: Final answer
    x = 581,162.16

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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.