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Finding the Fourth Proportional to 247.40, 341.36 and 143.88

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Solution

The fourth proportional to 247.40, 341.36 and 143.88 is: 198.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.40 : 341.36 = 143.88 : x
  2. Step 2: Convert to fraction form
    247.40/341.36 = 143.88/x
  3. Step 3: Cross multiply
    247.40x = 341.36 × 143.88
  4. Step 4: Simplify right side
    247.40x = 49,114.88
  5. Step 5: Solve for x
    x = 49,114.88/247.40
  6. Step 6: Final answer
    x = 198.52

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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.