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Finding the Fourth Proportional to 361.72, 542.09 and 240.06

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Solution

The fourth proportional to 361.72, 542.09 and 240.06 is: 359.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.72 : 542.09 = 240.06 : x
  2. Step 2: Convert to fraction form
    361.72/542.09 = 240.06/x
  3. Step 3: Cross multiply
    361.72x = 542.09 × 240.06
  4. Step 4: Simplify right side
    361.72x = 130,136.76
  5. Step 5: Solve for x
    x = 130,136.76/361.72
  6. Step 6: Final answer
    x = 359.78

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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.