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Finding the Fourth Proportional to 187, 258.15 and 135.34

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Solution

The fourth proportional to 187, 258.15 and 135.34 is: 186.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    187 : 258.15 = 135.34 : x
  2. Step 2: Convert to fraction form
    187/258.15 = 135.34/x
  3. Step 3: Cross multiply
    187x = 258.15 × 135.34
  4. Step 4: Simplify right side
    187x = 34,938.02
  5. Step 5: Solve for x
    x = 34,938.02/187
  6. Step 6: Final answer
    x = 186.83

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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.