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Finding the Fourth Proportional to 979.35, 1,469.02 and 922.29

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Solution

The fourth proportional to 979.35, 1,469.02 and 922.29 is: 1,383.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.35 : 1,469.02 = 922.29 : x
  2. Step 2: Convert to fraction form
    979.35/1,469.02 = 922.29/x
  3. Step 3: Cross multiply
    979.35x = 1,469.02 × 922.29
  4. Step 4: Simplify right side
    979.35x = 1,354,862.46
  5. Step 5: Solve for x
    x = 1,354,862.46/979.35
  6. Step 6: Final answer
    x = 1,383.43

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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.