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Finding the Fourth Proportional to 206.24, 308.88 and 137.57

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Solution

The fourth proportional to 206.24, 308.88 and 137.57 is: 206.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.24 : 308.88 = 137.57 : x
  2. Step 2: Convert to fraction form
    206.24/308.88 = 137.57/x
  3. Step 3: Cross multiply
    206.24x = 308.88 × 137.57
  4. Step 4: Simplify right side
    206.24x = 42,491.08
  5. Step 5: Solve for x
    x = 42,491.08/206.24
  6. Step 6: Final answer
    x = 206.03

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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.