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Finding the Fourth Proportional to 220.34, 330.53 and 104.76

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Solution

The fourth proportional to 220.34, 330.53 and 104.76 is: 157.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.34 : 330.53 = 104.76 : x
  2. Step 2: Convert to fraction form
    220.34/330.53 = 104.76/x
  3. Step 3: Cross multiply
    220.34x = 330.53 × 104.76
  4. Step 4: Simplify right side
    220.34x = 34,625.80
  5. Step 5: Solve for x
    x = 34,625.80/220.34
  6. Step 6: Final answer
    x = 157.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.