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Finding the Fourth Proportional to 251.19, 376.80 and 97.18

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Solution

The fourth proportional to 251.19, 376.80 and 97.18 is: 145.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.19 : 376.80 = 97.18 : x
  2. Step 2: Convert to fraction form
    251.19/376.80 = 97.18/x
  3. Step 3: Cross multiply
    251.19x = 376.80 × 97.18
  4. Step 4: Simplify right side
    251.19x = 36,617.42
  5. Step 5: Solve for x
    x = 36,617.42/251.19
  6. Step 6: Final answer
    x = 145.78

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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.