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Finding the Fourth Proportional to 250.78, 376.17 and 68.18

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Solution

The fourth proportional to 250.78, 376.17 and 68.18 is: 102.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.78 : 376.17 = 68.18 : x
  2. Step 2: Convert to fraction form
    250.78/376.17 = 68.18/x
  3. Step 3: Cross multiply
    250.78x = 376.17 × 68.18
  4. Step 4: Simplify right side
    250.78x = 25,645.61
  5. Step 5: Solve for x
    x = 25,645.61/250.78
  6. Step 6: Final answer
    x = 102.26

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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.