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Finding the Fourth Proportional to 394,891.76, 592,337.20 and 128,651.84

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Solution

The fourth proportional to 394,891.76, 592,337.20 and 128,651.84 is: 192,977.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,891.76 : 592,337.20 = 128,651.84 : x
  2. Step 2: Convert to fraction form
    394,891.76/592,337.20 = 128,651.84/x
  3. Step 3: Cross multiply
    394,891.76x = 592,337.20 × 128,651.84
  4. Step 4: Simplify right side
    394,891.76x = 76,205,270,680.45
  5. Step 5: Solve for x
    x = 76,205,270,680.45/394,891.76
  6. Step 6: Final answer
    x = 192,977.62

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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.