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Finding the Fourth Proportional to 187.22, 258.72 and 171.02

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Solution

The fourth proportional to 187.22, 258.72 and 171.02 is: 236.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.22 : 258.72 = 171.02 : x
  2. Step 2: Convert to fraction form
    187.22/258.72 = 171.02/x
  3. Step 3: Cross multiply
    187.22x = 258.72 × 171.02
  4. Step 4: Simplify right side
    187.22x = 44,246.29
  5. Step 5: Solve for x
    x = 44,246.29/187.22
  6. Step 6: Final answer
    x = 236.33

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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.