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Finding the Fourth Proportional to 689.06, 951.07 and 394.49

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Solution

The fourth proportional to 689.06, 951.07 and 394.49 is: 544.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.06 : 951.07 = 394.49 : x
  2. Step 2: Convert to fraction form
    689.06/951.07 = 394.49/x
  3. Step 3: Cross multiply
    689.06x = 951.07 × 394.49
  4. Step 4: Simplify right side
    689.06x = 375,187.60
  5. Step 5: Solve for x
    x = 375,187.60/689.06
  6. Step 6: Final answer
    x = 544.49

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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.