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Finding the Fourth Proportional to 206.72, 308.10 and 205.03

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Solution

The fourth proportional to 206.72, 308.10 and 205.03 is: 305.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.72 : 308.10 = 205.03 : x
  2. Step 2: Convert to fraction form
    206.72/308.10 = 205.03/x
  3. Step 3: Cross multiply
    206.72x = 308.10 × 205.03
  4. Step 4: Simplify right side
    206.72x = 63,169.74
  5. Step 5: Solve for x
    x = 63,169.74/206.72
  6. Step 6: Final answer
    x = 305.58

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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.