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Finding the Fourth Proportional to 701.81, 968.57 and 391.31

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Solution

The fourth proportional to 701.81, 968.57 and 391.31 is: 540.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.81 : 968.57 = 391.31 : x
  2. Step 2: Convert to fraction form
    701.81/968.57 = 391.31/x
  3. Step 3: Cross multiply
    701.81x = 968.57 × 391.31
  4. Step 4: Simplify right side
    701.81x = 379,011.13
  5. Step 5: Solve for x
    x = 379,011.13/701.81
  6. Step 6: Final answer
    x = 540.05

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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.