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Finding the Fourth Proportional to 249.86, 344.81 and 151.68

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Solution

The fourth proportional to 249.86, 344.81 and 151.68 is: 209.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.86 : 344.81 = 151.68 : x
  2. Step 2: Convert to fraction form
    249.86/344.81 = 151.68/x
  3. Step 3: Cross multiply
    249.86x = 344.81 × 151.68
  4. Step 4: Simplify right side
    249.86x = 52,300.02
  5. Step 5: Solve for x
    x = 52,300.02/249.86
  6. Step 6: Final answer
    x = 209.32

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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.