Home / 861,428.71-1,292,430.80-381,591.33

Finding the Fourth Proportional to 861,428.71, 1,292,430.80 and 381,591.33

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Solution

The fourth proportional to 861,428.71, 1,292,430.80 and 381,591.33 is: 572,514.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,428.71 : 1,292,430.80 = 381,591.33 : x
  2. Step 2: Convert to fraction form
    861,428.71/1,292,430.80 = 381,591.33/x
  3. Step 3: Cross multiply
    861,428.71x = 1,292,430.80 × 381,591.33
  4. Step 4: Simplify right side
    861,428.71x = 493,180,387,904.96
  5. Step 5: Solve for x
    x = 493,180,387,904.96/861,428.71
  6. Step 6: Final answer
    x = 572,514.45

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1.5x scale

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.