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Finding the Fourth Proportional to 861,580.76, 1,292,377.54 and 321,959

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Solution

The fourth proportional to 861,580.76, 1,292,377.54 and 321,959 is: 482,940.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,580.76 : 1,292,377.54 = 321,959 : x
  2. Step 2: Convert to fraction form
    861,580.76/1,292,377.54 = 321,959/x
  3. Step 3: Cross multiply
    861,580.76x = 1,292,377.54 × 321,959
  4. Step 4: Simplify right side
    861,580.76x = 416,092,580,400.86
  5. Step 5: Solve for x
    x = 416,092,580,400.86/861,580.76
  6. Step 6: Final answer
    x = 482,940.89

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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.