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Finding the Fourth Proportional to 250.76, 376.15 and 86.23

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Solution

The fourth proportional to 250.76, 376.15 and 86.23 is: 129.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.76 : 376.15 = 86.23 : x
  2. Step 2: Convert to fraction form
    250.76/376.15 = 86.23/x
  3. Step 3: Cross multiply
    250.76x = 376.15 × 86.23
  4. Step 4: Simplify right side
    250.76x = 32,433.53
  5. Step 5: Solve for x
    x = 32,433.53/250.76
  6. Step 6: Final answer
    x = 129.34

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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.