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Finding the Fourth Proportional to 1,065.04, 1,469.22 and 691.96

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Solution

The fourth proportional to 1,065.04, 1,469.22 and 691.96 is: 954.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.04 : 1,469.22 = 691.96 : x
  2. Step 2: Convert to fraction form
    1,065.04/1,469.22 = 691.96/x
  3. Step 3: Cross multiply
    1,065.04x = 1,469.22 × 691.96
  4. Step 4: Simplify right side
    1,065.04x = 1,016,641.47
  5. Step 5: Solve for x
    x = 1,016,641.47/1,065.04
  6. Step 6: Final answer
    x = 954.56

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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.