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Finding the Fourth Proportional to 701.92, 968.70 and 391.42

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Solution

The fourth proportional to 701.92, 968.70 and 391.42 is: 540.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.92 : 968.70 = 391.42 : x
  2. Step 2: Convert to fraction form
    701.92/968.70 = 391.42/x
  3. Step 3: Cross multiply
    701.92x = 968.70 × 391.42
  4. Step 4: Simplify right side
    701.92x = 379,168.55
  5. Step 5: Solve for x
    x = 379,168.55/701.92
  6. Step 6: Final answer
    x = 540.19

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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.