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Finding the Fourth Proportional to 652.79, 979.34 and 219.94

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Solution

The fourth proportional to 652.79, 979.34 and 219.94 is: 329.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.79 : 979.34 = 219.94 : x
  2. Step 2: Convert to fraction form
    652.79/979.34 = 219.94/x
  3. Step 3: Cross multiply
    652.79x = 979.34 × 219.94
  4. Step 4: Simplify right side
    652.79x = 215,392.49
  5. Step 5: Solve for x
    x = 215,392.49/652.79
  6. Step 6: Final answer
    x = 329.96

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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.