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Finding the Fourth Proportional to 950.82, 1,426.71 and 721.14

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Solution

The fourth proportional to 950.82, 1,426.71 and 721.14 is: 1,082.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.82 : 1,426.71 = 721.14 : x
  2. Step 2: Convert to fraction form
    950.82/1,426.71 = 721.14/x
  3. Step 3: Cross multiply
    950.82x = 1,426.71 × 721.14
  4. Step 4: Simplify right side
    950.82x = 1,028,857.65
  5. Step 5: Solve for x
    x = 1,028,857.65/950.82
  6. Step 6: Final answer
    x = 1,082.07

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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.