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Finding the Fourth Proportional to 252.19, 378.45 and 187.26

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Solution

The fourth proportional to 252.19, 378.45 and 187.26 is: 281.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.19 : 378.45 = 187.26 : x
  2. Step 2: Convert to fraction form
    252.19/378.45 = 187.26/x
  3. Step 3: Cross multiply
    252.19x = 378.45 × 187.26
  4. Step 4: Simplify right side
    252.19x = 70,869.91
  5. Step 5: Solve for x
    x = 70,869.91/252.19
  6. Step 6: Final answer
    x = 281.02

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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.