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Finding the Fourth Proportional to 206.80, 310.18 and 125.62

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Solution

The fourth proportional to 206.80, 310.18 and 125.62 is: 188.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.80 : 310.18 = 125.62 : x
  2. Step 2: Convert to fraction form
    206.80/310.18 = 125.62/x
  3. Step 3: Cross multiply
    206.80x = 310.18 × 125.62
  4. Step 4: Simplify right side
    206.80x = 38,964.81
  5. Step 5: Solve for x
    x = 38,964.81/206.80
  6. Step 6: Final answer
    x = 188.42

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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.