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Finding the Fourth Proportional to 247.20, 372.47 and 204.81

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Solution

The fourth proportional to 247.20, 372.47 and 204.81 is: 308.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.20 : 372.47 = 204.81 : x
  2. Step 2: Convert to fraction form
    247.20/372.47 = 204.81/x
  3. Step 3: Cross multiply
    247.20x = 372.47 × 204.81
  4. Step 4: Simplify right side
    247.20x = 76,285.58
  5. Step 5: Solve for x
    x = 76,285.58/247.20
  6. Step 6: Final answer
    x = 308.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.