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Finding the Fourth Proportional to 689.91, 952.10 and 379.41

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Solution

The fourth proportional to 689.91, 952.10 and 379.41 is: 523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.91 : 952.10 = 379.41 : x
  2. Step 2: Convert to fraction form
    689.91/952.10 = 379.41/x
  3. Step 3: Cross multiply
    689.91x = 952.10 × 379.41
  4. Step 4: Simplify right side
    689.91x = 361,236.26
  5. Step 5: Solve for x
    x = 361,236.26/689.91
  6. Step 6: Final answer
    x = 523.60

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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.