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Finding the Fourth Proportional to 394,597.77, 591,902.12 and 128,359.68

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Solution

The fourth proportional to 394,597.77, 591,902.12 and 128,359.68 is: 192,541.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,597.77 : 591,902.12 = 128,359.68 : x
  2. Step 2: Convert to fraction form
    394,597.77/591,902.12 = 128,359.68/x
  3. Step 3: Cross multiply
    394,597.77x = 591,902.12 × 128,359.68
  4. Step 4: Simplify right side
    394,597.77x = 75,976,366,714.52
  5. Step 5: Solve for x
    x = 75,976,366,714.52/394,597.77
  6. Step 6: Final answer
    x = 192,541.30

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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.