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Finding the Fourth Proportional to 694.78, 963.37 and 671.65

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Solution

The fourth proportional to 694.78, 963.37 and 671.65 is: 931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.78 : 963.37 = 671.65 : x
  2. Step 2: Convert to fraction form
    694.78/963.37 = 671.65/x
  3. Step 3: Cross multiply
    694.78x = 963.37 × 671.65
  4. Step 4: Simplify right side
    694.78x = 647,047.46
  5. Step 5: Solve for x
    x = 647,047.46/694.78
  6. Step 6: Final answer
    x = 931.30

Related Problems

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.