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Finding the Fourth Proportional to 219.84, 329.66 and 75.46

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Solution

The fourth proportional to 219.84, 329.66 and 75.46 is: 113.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.84 : 329.66 = 75.46 : x
  2. Step 2: Convert to fraction form
    219.84/329.66 = 75.46/x
  3. Step 3: Cross multiply
    219.84x = 329.66 × 75.46
  4. Step 4: Simplify right side
    219.84x = 24,876.14
  5. Step 5: Solve for x
    x = 24,876.14/219.84
  6. Step 6: Final answer
    x = 113.16

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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.