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Finding the Fourth Proportional to 187.18, 281.41 and 147.08

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Solution

The fourth proportional to 187.18, 281.41 and 147.08 is: 221.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.18 : 281.41 = 147.08 : x
  2. Step 2: Convert to fraction form
    187.18/281.41 = 147.08/x
  3. Step 3: Cross multiply
    187.18x = 281.41 × 147.08
  4. Step 4: Simplify right side
    187.18x = 41,390.12
  5. Step 5: Solve for x
    x = 41,390.12/187.18
  6. Step 6: Final answer
    x = 221.13

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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.