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Finding the Fourth Proportional to 206.68, 308.47 and 179.16

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Solution

The fourth proportional to 206.68, 308.47 and 179.16 is: 267.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.68 : 308.47 = 179.16 : x
  2. Step 2: Convert to fraction form
    206.68/308.47 = 179.16/x
  3. Step 3: Cross multiply
    206.68x = 308.47 × 179.16
  4. Step 4: Simplify right side
    206.68x = 55,265.49
  5. Step 5: Solve for x
    x = 55,265.49/206.68
  6. Step 6: Final answer
    x = 267.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.