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Finding the Fourth Proportional to 2,082.64, 3,122.87 and 766.06

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Solution

The fourth proportional to 2,082.64, 3,122.87 and 766.06 is: 1,148.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.64 : 3,122.87 = 766.06 : x
  2. Step 2: Convert to fraction form
    2,082.64/3,122.87 = 766.06/x
  3. Step 3: Cross multiply
    2,082.64x = 3,122.87 × 766.06
  4. Step 4: Simplify right side
    2,082.64x = 2,392,290.18
  5. Step 5: Solve for x
    x = 2,392,290.18/2,082.64
  6. Step 6: Final answer
    x = 1,148.68

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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.