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Finding the Fourth Proportional to 689.92, 952.09 and 379.42

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Solution

The fourth proportional to 689.92, 952.09 and 379.42 is: 523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.92 : 952.09 = 379.42 : x
  2. Step 2: Convert to fraction form
    689.92/952.09 = 379.42/x
  3. Step 3: Cross multiply
    689.92x = 952.09 × 379.42
  4. Step 4: Simplify right side
    689.92x = 361,241.99
  5. Step 5: Solve for x
    x = 361,241.99/689.92
  6. Step 6: Final answer
    x = 523.60

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1.5x scale

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.