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Finding the Fourth Proportional to 694.46, 955.91 and 628.85

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Solution

The fourth proportional to 694.46, 955.91 and 628.85 is: 865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.46 : 955.91 = 628.85 : x
  2. Step 2: Convert to fraction form
    694.46/955.91 = 628.85/x
  3. Step 3: Cross multiply
    694.46x = 955.91 × 628.85
  4. Step 4: Simplify right side
    694.46x = 601,120.80
  5. Step 5: Solve for x
    x = 601,120.80/694.46
  6. Step 6: Final answer
    x = 865.60

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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.