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Finding the Fourth Proportional to 206.35, 284.75 and 153.79

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Solution

The fourth proportional to 206.35, 284.75 and 153.79 is: 212.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.35 : 284.75 = 153.79 : x
  2. Step 2: Convert to fraction form
    206.35/284.75 = 153.79/x
  3. Step 3: Cross multiply
    206.35x = 284.75 × 153.79
  4. Step 4: Simplify right side
    206.35x = 43,790.80
  5. Step 5: Solve for x
    x = 43,790.80/206.35
  6. Step 6: Final answer
    x = 212.22

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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.