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Finding the Fourth Proportional to 689.39, 950.67 and 632.48

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Solution

The fourth proportional to 689.39, 950.67 and 632.48 is: 872.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.39 : 950.67 = 632.48 : x
  2. Step 2: Convert to fraction form
    689.39/950.67 = 632.48/x
  3. Step 3: Cross multiply
    689.39x = 950.67 × 632.48
  4. Step 4: Simplify right side
    689.39x = 601,275.01
  5. Step 5: Solve for x
    x = 601,275.01/689.39
  6. Step 6: Final answer
    x = 872.18

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Double scale
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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.