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Finding the Fourth Proportional to 696.60, 1,034.10 and 667.44

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Solution

The fourth proportional to 696.60, 1,034.10 and 667.44 is: 990.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.60 : 1,034.10 = 667.44 : x
  2. Step 2: Convert to fraction form
    696.60/1,034.10 = 667.44/x
  3. Step 3: Cross multiply
    696.60x = 1,034.10 × 667.44
  4. Step 4: Simplify right side
    696.60x = 690,199.70
  5. Step 5: Solve for x
    x = 690,199.70/696.60
  6. Step 6: Final answer
    x = 990.81

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.