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Finding the Fourth Proportional to 1,218.32, 1,832.96 and 731.76

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Solution

The fourth proportional to 1,218.32, 1,832.96 and 731.76 is: 1,100.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.32 : 1,832.96 = 731.76 : x
  2. Step 2: Convert to fraction form
    1,218.32/1,832.96 = 731.76/x
  3. Step 3: Cross multiply
    1,218.32x = 1,832.96 × 731.76
  4. Step 4: Simplify right side
    1,218.32x = 1,341,286.81
  5. Step 5: Solve for x
    x = 1,341,286.81/1,218.32
  6. Step 6: Final answer
    x = 1,100.93

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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.