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Finding the Fourth Proportional to 240.88, 361.48 and 138.32

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Solution

The fourth proportional to 240.88, 361.48 and 138.32 is: 207.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.88 : 361.48 = 138.32 : x
  2. Step 2: Convert to fraction form
    240.88/361.48 = 138.32/x
  3. Step 3: Cross multiply
    240.88x = 361.48 × 138.32
  4. Step 4: Simplify right side
    240.88x = 49,999.91
  5. Step 5: Solve for x
    x = 49,999.91/240.88
  6. Step 6: Final answer
    x = 207.57

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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.