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Finding the Fourth Proportional to 731.92, 1,097.48 and 298.72

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Solution

The fourth proportional to 731.92, 1,097.48 and 298.72 is: 447.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.92 : 1,097.48 = 298.72 : x
  2. Step 2: Convert to fraction form
    731.92/1,097.48 = 298.72/x
  3. Step 3: Cross multiply
    731.92x = 1,097.48 × 298.72
  4. Step 4: Simplify right side
    731.92x = 327,839.23
  5. Step 5: Solve for x
    x = 327,839.23/731.92
  6. Step 6: Final answer
    x = 447.92

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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.