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Finding the Fourth Proportional to 249.79, 374.39 and 124.64

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Solution

The fourth proportional to 249.79, 374.39 and 124.64 is: 186.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.79 : 374.39 = 124.64 : x
  2. Step 2: Convert to fraction form
    249.79/374.39 = 124.64/x
  3. Step 3: Cross multiply
    249.79x = 374.39 × 124.64
  4. Step 4: Simplify right side
    249.79x = 46,663.97
  5. Step 5: Solve for x
    x = 46,663.97/249.79
  6. Step 6: Final answer
    x = 186.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.