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Finding the Fourth Proportional to 247.32, 341.55 and 198.72

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Solution

The fourth proportional to 247.32, 341.55 and 198.72 is: 274.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.32 : 341.55 = 198.72 : x
  2. Step 2: Convert to fraction form
    247.32/341.55 = 198.72/x
  3. Step 3: Cross multiply
    247.32x = 341.55 × 198.72
  4. Step 4: Simplify right side
    247.32x = 67,872.82
  5. Step 5: Solve for x
    x = 67,872.82/247.32
  6. Step 6: Final answer
    x = 274.43

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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.