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Finding the Fourth Proportional to 187.71, 259.25 and 185.15

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Solution

The fourth proportional to 187.71, 259.25 and 185.15 is: 255.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.71 : 259.25 = 185.15 : x
  2. Step 2: Convert to fraction form
    187.71/259.25 = 185.15/x
  3. Step 3: Cross multiply
    187.71x = 259.25 × 185.15
  4. Step 4: Simplify right side
    187.71x = 48,000.14
  5. Step 5: Solve for x
    x = 48,000.14/187.71
  6. Step 6: Final answer
    x = 255.71

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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.