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Finding the Fourth Proportional to 279,494.88, 385,711.20 and 158,633.76

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Solution

The fourth proportional to 279,494.88, 385,711.20 and 158,633.76 is: 218,919.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,494.88 : 385,711.20 = 158,633.76 : x
  2. Step 2: Convert to fraction form
    279,494.88/385,711.20 = 158,633.76/x
  3. Step 3: Cross multiply
    279,494.88x = 385,711.20 × 158,633.76
  4. Step 4: Simplify right side
    279,494.88x = 61,186,817,930.11
  5. Step 5: Solve for x
    x = 61,186,817,930.11/279,494.88
  6. Step 6: Final answer
    x = 218,919.28

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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.