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Finding the Fourth Proportional to 279,180.80, 385,337.94 and 158,392.79

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Solution

The fourth proportional to 279,180.80, 385,337.94 and 158,392.79 is: 218,620.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,180.80 : 385,337.94 = 158,392.79 : x
  2. Step 2: Convert to fraction form
    279,180.80/385,337.94 = 158,392.79/x
  3. Step 3: Cross multiply
    279,180.80x = 385,337.94 × 158,392.79
  4. Step 4: Simplify right side
    279,180.80x = 61,034,752,372.80
  5. Step 5: Solve for x
    x = 61,034,752,372.80/279,180.80
  6. Step 6: Final answer
    x = 218,620.88

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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.