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Finding the Fourth Proportional to 731.95, 1,098.50 and 385.48

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Solution

The fourth proportional to 731.95, 1,098.50 and 385.48 is: 578.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.95 : 1,098.50 = 385.48 : x
  2. Step 2: Convert to fraction form
    731.95/1,098.50 = 385.48/x
  3. Step 3: Cross multiply
    731.95x = 1,098.50 × 385.48
  4. Step 4: Simplify right side
    731.95x = 423,449.78
  5. Step 5: Solve for x
    x = 423,449.78/731.95
  6. Step 6: Final answer
    x = 578.52

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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.