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Finding the Fourth Proportional to 253.60, 378.18 and 251.29

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Solution

The fourth proportional to 253.60, 378.18 and 251.29 is: 374.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.60 : 378.18 = 251.29 : x
  2. Step 2: Convert to fraction form
    253.60/378.18 = 251.29/x
  3. Step 3: Cross multiply
    253.60x = 378.18 × 251.29
  4. Step 4: Simplify right side
    253.60x = 95,033.56
  5. Step 5: Solve for x
    x = 95,033.56/253.60
  6. Step 6: Final answer
    x = 374.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.