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Finding the Fourth Proportional to 397.88, 548.98 and 240.48

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Solution

The fourth proportional to 397.88, 548.98 and 240.48 is: 331.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.88 : 548.98 = 240.48 : x
  2. Step 2: Convert to fraction form
    397.88/548.98 = 240.48/x
  3. Step 3: Cross multiply
    397.88x = 548.98 × 240.48
  4. Step 4: Simplify right side
    397.88x = 132,018.71
  5. Step 5: Solve for x
    x = 132,018.71/397.88
  6. Step 6: Final answer
    x = 331.81

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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.