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Finding the Fourth Proportional to 814.68, 1,122 and 704.04

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Solution

The fourth proportional to 814.68, 1,122 and 704.04 is: 969.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.68 : 1,122 = 704.04 : x
  2. Step 2: Convert to fraction form
    814.68/1,122 = 704.04/x
  3. Step 3: Cross multiply
    814.68x = 1,122 × 704.04
  4. Step 4: Simplify right side
    814.68x = 789,932.88
  5. Step 5: Solve for x
    x = 789,932.88/814.68
  6. Step 6: Final answer
    x = 969.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.