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Finding the Fourth Proportional to 249.70, 344.58 and 139.17

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Solution

The fourth proportional to 249.70, 344.58 and 139.17 is: 192.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.70 : 344.58 = 139.17 : x
  2. Step 2: Convert to fraction form
    249.70/344.58 = 139.17/x
  3. Step 3: Cross multiply
    249.70x = 344.58 × 139.17
  4. Step 4: Simplify right side
    249.70x = 47,955.20
  5. Step 5: Solve for x
    x = 47,955.20/249.70
  6. Step 6: Final answer
    x = 192.05

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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.