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Finding the Fourth Proportional to 206.35, 309.48 and 125.08

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Solution

The fourth proportional to 206.35, 309.48 and 125.08 is: 187.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.35 : 309.48 = 125.08 : x
  2. Step 2: Convert to fraction form
    206.35/309.48 = 125.08/x
  3. Step 3: Cross multiply
    206.35x = 309.48 × 125.08
  4. Step 4: Simplify right side
    206.35x = 38,709.76
  5. Step 5: Solve for x
    x = 38,709.76/206.35
  6. Step 6: Final answer
    x = 187.59

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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.