Home / 861,131.28-1,291,987.29-381,293.57

Finding the Fourth Proportional to 861,131.28, 1,291,987.29 and 381,293.57

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Solution

The fourth proportional to 861,131.28, 1,291,987.29 and 381,293.57 is: 572,068.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,131.28 : 1,291,987.29 = 381,293.57 : x
  2. Step 2: Convert to fraction form
    861,131.28/1,291,987.29 = 381,293.57/x
  3. Step 3: Cross multiply
    861,131.28x = 1,291,987.29 × 381,293.57
  4. Step 4: Simplify right side
    861,131.28x = 492,626,439,738.79
  5. Step 5: Solve for x
    x = 492,626,439,738.79/861,131.28
  6. Step 6: Final answer
    x = 572,068.92

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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.