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Finding the Fourth Proportional to 398.18, 549.52 and 240.77

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Solution

The fourth proportional to 398.18, 549.52 and 240.77 is: 332.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.18 : 549.52 = 240.77 : x
  2. Step 2: Convert to fraction form
    398.18/549.52 = 240.77/x
  3. Step 3: Cross multiply
    398.18x = 549.52 × 240.77
  4. Step 4: Simplify right side
    398.18x = 132,308.70
  5. Step 5: Solve for x
    x = 132,308.70/398.18
  6. Step 6: Final answer
    x = 332.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.