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Finding the Fourth Proportional to 187.53, 258.39 and 187.17

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Solution

The fourth proportional to 187.53, 258.39 and 187.17 is: 257.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.53 : 258.39 = 187.17 : x
  2. Step 2: Convert to fraction form
    187.53/258.39 = 187.17/x
  3. Step 3: Cross multiply
    187.53x = 258.39 × 187.17
  4. Step 4: Simplify right side
    187.53x = 48,362.86
  5. Step 5: Solve for x
    x = 48,362.86/187.53
  6. Step 6: Final answer
    x = 257.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.