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Finding the Fourth Proportional to 1,082.43, 1,619.49 and 620.43

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Solution

The fourth proportional to 1,082.43, 1,619.49 and 620.43 is: 928.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.43 : 1,619.49 = 620.43 : x
  2. Step 2: Convert to fraction form
    1,082.43/1,619.49 = 620.43/x
  3. Step 3: Cross multiply
    1,082.43x = 1,619.49 × 620.43
  4. Step 4: Simplify right side
    1,082.43x = 1,004,780.18
  5. Step 5: Solve for x
    x = 1,004,780.18/1,082.43
  6. Step 6: Final answer
    x = 928.26

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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.