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Finding the Fourth Proportional to 206.72, 285.30 and 119.39

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Solution

The fourth proportional to 206.72, 285.30 and 119.39 is: 164.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.72 : 285.30 = 119.39 : x
  2. Step 2: Convert to fraction form
    206.72/285.30 = 119.39/x
  3. Step 3: Cross multiply
    206.72x = 285.30 × 119.39
  4. Step 4: Simplify right side
    206.72x = 34,061.97
  5. Step 5: Solve for x
    x = 34,061.97/206.72
  6. Step 6: Final answer
    x = 164.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.