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Finding the Fourth Proportional to 397.46, 548.54 and 240.12

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Solution

The fourth proportional to 397.46, 548.54 and 240.12 is: 331.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.46 : 548.54 = 240.12 : x
  2. Step 2: Convert to fraction form
    397.46/548.54 = 240.12/x
  3. Step 3: Cross multiply
    397.46x = 548.54 × 240.12
  4. Step 4: Simplify right side
    397.46x = 131,714.22
  5. Step 5: Solve for x
    x = 131,714.22/397.46
  6. Step 6: Final answer
    x = 331.39

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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.