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Finding the Fourth Proportional to 398.96, 597.96 and 242.72

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Solution

The fourth proportional to 398.96, 597.96 and 242.72 is: 363.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.96 : 597.96 = 242.72 : x
  2. Step 2: Convert to fraction form
    398.96/597.96 = 242.72/x
  3. Step 3: Cross multiply
    398.96x = 597.96 × 242.72
  4. Step 4: Simplify right side
    398.96x = 145,136.85
  5. Step 5: Solve for x
    x = 145,136.85/398.96
  6. Step 6: Final answer
    x = 363.79

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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.