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Finding the Fourth Proportional to 2,082.92, 3,123.80 and 696.30

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Solution

The fourth proportional to 2,082.92, 3,123.80 and 696.30 is: 1,044.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.92 : 3,123.80 = 696.30 : x
  2. Step 2: Convert to fraction form
    2,082.92/3,123.80 = 696.30/x
  3. Step 3: Cross multiply
    2,082.92x = 3,123.80 × 696.30
  4. Step 4: Simplify right side
    2,082.92x = 2,175,101.94
  5. Step 5: Solve for x
    x = 2,175,101.94/2,082.92
  6. Step 6: Final answer
    x = 1,044.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.