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Finding the Fourth Proportional to 1,082.32, 1,621.99 and 619.12

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Solution

The fourth proportional to 1,082.32, 1,621.99 and 619.12 is: 927.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.32 : 1,621.99 = 619.12 : x
  2. Step 2: Convert to fraction form
    1,082.32/1,621.99 = 619.12/x
  3. Step 3: Cross multiply
    1,082.32x = 1,621.99 × 619.12
  4. Step 4: Simplify right side
    1,082.32x = 1,004,205.77
  5. Step 5: Solve for x
    x = 1,004,205.77/1,082.32
  6. Step 6: Final answer
    x = 927.83

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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.