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Finding the Fourth Proportional to 250.24, 375.38 and 76.90

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Solution

The fourth proportional to 250.24, 375.38 and 76.90 is: 115.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.24 : 375.38 = 76.90 : x
  2. Step 2: Convert to fraction form
    250.24/375.38 = 76.90/x
  3. Step 3: Cross multiply
    250.24x = 375.38 × 76.90
  4. Step 4: Simplify right side
    250.24x = 28,866.72
  5. Step 5: Solve for x
    x = 28,866.72/250.24
  6. Step 6: Final answer
    x = 115.36

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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.