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Finding the Fourth Proportional to 695.78, 964.76 and 672.65

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Solution

The fourth proportional to 695.78, 964.76 and 672.65 is: 932.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.78 : 964.76 = 672.65 : x
  2. Step 2: Convert to fraction form
    695.78/964.76 = 672.65/x
  3. Step 3: Cross multiply
    695.78x = 964.76 × 672.65
  4. Step 4: Simplify right side
    695.78x = 648,945.81
  5. Step 5: Solve for x
    x = 648,945.81/695.78
  6. Step 6: Final answer
    x = 932.69

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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.