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Finding the Fourth Proportional to 247.40, 341.36 and 143.90

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Solution

The fourth proportional to 247.40, 341.36 and 143.90 is: 198.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.40 : 341.36 = 143.90 : x
  2. Step 2: Convert to fraction form
    247.40/341.36 = 143.90/x
  3. Step 3: Cross multiply
    247.40x = 341.36 × 143.90
  4. Step 4: Simplify right side
    247.40x = 49,121.70
  5. Step 5: Solve for x
    x = 49,121.70/247.40
  6. Step 6: Final answer
    x = 198.55

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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.