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Finding the Fourth Proportional to 279,215.28, 418,817.52 and 79,536.96

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Solution

The fourth proportional to 279,215.28, 418,817.52 and 79,536.96 is: 119,303.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,215.28 : 418,817.52 = 79,536.96 : x
  2. Step 2: Convert to fraction form
    279,215.28/418,817.52 = 79,536.96/x
  3. Step 3: Cross multiply
    279,215.28x = 418,817.52 × 79,536.96
  4. Step 4: Simplify right side
    279,215.28x = 33,311,472,335.54
  5. Step 5: Solve for x
    x = 33,311,472,335.54/279,215.28
  6. Step 6: Final answer
    x = 119,303.90

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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.