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Finding the Fourth Proportional to 716,505.90, 988,793.45 and 394,216.92

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Solution

The fourth proportional to 716,505.90, 988,793.45 and 394,216.92 is: 544,027.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,505.90 : 988,793.45 = 394,216.92 : x
  2. Step 2: Convert to fraction form
    716,505.90/988,793.45 = 394,216.92/x
  3. Step 3: Cross multiply
    716,505.90x = 988,793.45 × 394,216.92
  4. Step 4: Simplify right side
    716,505.90x = 389,799,108,375.17
  5. Step 5: Solve for x
    x = 389,799,108,375.17/716,505.90
  6. Step 6: Final answer
    x = 544,027.78

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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.