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Finding the Fourth Proportional to 249.02, 343.64 and 138.50

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Solution

The fourth proportional to 249.02, 343.64 and 138.50 is: 191.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.02 : 343.64 = 138.50 : x
  2. Step 2: Convert to fraction form
    249.02/343.64 = 138.50/x
  3. Step 3: Cross multiply
    249.02x = 343.64 × 138.50
  4. Step 4: Simplify right side
    249.02x = 47,595.35
  5. Step 5: Solve for x
    x = 47,595.35/249.02
  6. Step 6: Final answer
    x = 191.13

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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.