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Finding the Fourth Proportional to 247.35, 371.45 and 206.18

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Solution

The fourth proportional to 247.35, 371.45 and 206.18 is: 309.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.35 : 371.45 = 206.18 : x
  2. Step 2: Convert to fraction form
    247.35/371.45 = 206.18/x
  3. Step 3: Cross multiply
    247.35x = 371.45 × 206.18
  4. Step 4: Simplify right side
    247.35x = 76,585.61
  5. Step 5: Solve for x
    x = 76,585.61/247.35
  6. Step 6: Final answer
    x = 309.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.