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Finding the Fourth Proportional to 696.43, 959.12 and 681.31

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Solution

The fourth proportional to 696.43, 959.12 and 681.31 is: 938.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.43 : 959.12 = 681.31 : x
  2. Step 2: Convert to fraction form
    696.43/959.12 = 681.31/x
  3. Step 3: Cross multiply
    696.43x = 959.12 × 681.31
  4. Step 4: Simplify right side
    696.43x = 653,458.05
  5. Step 5: Solve for x
    x = 653,458.05/696.43
  6. Step 6: Final answer
    x = 938.30

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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.