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Finding the Fourth Proportional to 247.10, 340.92 and 143.60

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Solution

The fourth proportional to 247.10, 340.92 and 143.60 is: 198.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.10 : 340.92 = 143.60 : x
  2. Step 2: Convert to fraction form
    247.10/340.92 = 143.60/x
  3. Step 3: Cross multiply
    247.10x = 340.92 × 143.60
  4. Step 4: Simplify right side
    247.10x = 48,956.11
  5. Step 5: Solve for x
    x = 48,956.11/247.10
  6. Step 6: Final answer
    x = 198.12

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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.