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Finding the Fourth Proportional to 249.21, 343.98 and 155.93

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Solution

The fourth proportional to 249.21, 343.98 and 155.93 is: 215.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.21 : 343.98 = 155.93 : x
  2. Step 2: Convert to fraction form
    249.21/343.98 = 155.93/x
  3. Step 3: Cross multiply
    249.21x = 343.98 × 155.93
  4. Step 4: Simplify right side
    249.21x = 53,635.08
  5. Step 5: Solve for x
    x = 53,635.08/249.21
  6. Step 6: Final answer
    x = 215.22

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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.