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Finding the Fourth Proportional to 251.57, 377.13 and 89.18

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Solution

The fourth proportional to 251.57, 377.13 and 89.18 is: 133.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.57 : 377.13 = 89.18 : x
  2. Step 2: Convert to fraction form
    251.57/377.13 = 89.18/x
  3. Step 3: Cross multiply
    251.57x = 377.13 × 89.18
  4. Step 4: Simplify right side
    251.57x = 33,632.45
  5. Step 5: Solve for x
    x = 33,632.45/251.57
  6. Step 6: Final answer
    x = 133.69

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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.