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Finding the Fourth Proportional to 158.97, 217.79 and 153.05

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Solution

The fourth proportional to 158.97, 217.79 and 153.05 is: 209.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.97 : 217.79 = 153.05 : x
  2. Step 2: Convert to fraction form
    158.97/217.79 = 153.05/x
  3. Step 3: Cross multiply
    158.97x = 217.79 × 153.05
  4. Step 4: Simplify right side
    158.97x = 33,330.91
  5. Step 5: Solve for x
    x = 33,330.91/158.97
  6. Step 6: Final answer
    x = 209.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.