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Finding the Fourth Proportional to 1,163.24, 1,605.18 and 691.11

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Solution

The fourth proportional to 1,163.24, 1,605.18 and 691.11 is: 953.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.24 : 1,605.18 = 691.11 : x
  2. Step 2: Convert to fraction form
    1,163.24/1,605.18 = 691.11/x
  3. Step 3: Cross multiply
    1,163.24x = 1,605.18 × 691.11
  4. Step 4: Simplify right side
    1,163.24x = 1,109,355.95
  5. Step 5: Solve for x
    x = 1,109,355.95/1,163.24
  6. Step 6: Final answer
    x = 953.68

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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.