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Finding the Fourth Proportional to 394,952.50, 592,315.65 and 128,736.28

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Solution

The fourth proportional to 394,952.50, 592,315.65 and 128,736.28 is: 193,067.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,952.50 : 592,315.65 = 128,736.28 : x
  2. Step 2: Convert to fraction form
    394,952.50/592,315.65 = 128,736.28/x
  3. Step 3: Cross multiply
    394,952.50x = 592,315.65 × 128,736.28
  4. Step 4: Simplify right side
    394,952.50x = 76,252,511,885.99
  5. Step 5: Solve for x
    x = 76,252,511,885.99/394,952.50
  6. Step 6: Final answer
    x = 193,067.55

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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.