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Finding the Fourth Proportional to 220.12, 303.54 and 157.96

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Solution

The fourth proportional to 220.12, 303.54 and 157.96 is: 217.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.12 : 303.54 = 157.96 : x
  2. Step 2: Convert to fraction form
    220.12/303.54 = 157.96/x
  3. Step 3: Cross multiply
    220.12x = 303.54 × 157.96
  4. Step 4: Simplify right side
    220.12x = 47,947.18
  5. Step 5: Solve for x
    x = 47,947.18/220.12
  6. Step 6: Final answer
    x = 217.82

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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.