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Finding the Fourth Proportional to 861,595.95, 1,188,970.34 and 479,614.53

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Solution

The fourth proportional to 861,595.95, 1,188,970.34 and 479,614.53 is: 661,850.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,595.95 : 1,188,970.34 = 479,614.53 : x
  2. Step 2: Convert to fraction form
    861,595.95/1,188,970.34 = 479,614.53/x
  3. Step 3: Cross multiply
    861,595.95x = 1,188,970.34 × 479,614.53
  4. Step 4: Simplify right side
    861,595.95x = 570,247,448,404.97
  5. Step 5: Solve for x
    x = 570,247,448,404.97/861,595.95
  6. Step 6: Final answer
    x = 661,850.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.