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Finding the Fourth Proportional to 187.86, 257.45 and 185.44

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Solution

The fourth proportional to 187.86, 257.45 and 185.44 is: 254.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.86 : 257.45 = 185.44 : x
  2. Step 2: Convert to fraction form
    187.86/257.45 = 185.44/x
  3. Step 3: Cross multiply
    187.86x = 257.45 × 185.44
  4. Step 4: Simplify right side
    187.86x = 47,741.53
  5. Step 5: Solve for x
    x = 47,741.53/187.86
  6. Step 6: Final answer
    x = 254.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.