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Finding the Fourth Proportional to 689.33, 951.06 and 394.54

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Solution

The fourth proportional to 689.33, 951.06 and 394.54 is: 544.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.33 : 951.06 = 394.54 : x
  2. Step 2: Convert to fraction form
    689.33/951.06 = 394.54/x
  3. Step 3: Cross multiply
    689.33x = 951.06 × 394.54
  4. Step 4: Simplify right side
    689.33x = 375,229.24
  5. Step 5: Solve for x
    x = 375,229.24/689.33
  6. Step 6: Final answer
    x = 544.34

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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.