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Finding the Fourth Proportional to 1,138.92, 1,707.11 and 1,046.66

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Solution

The fourth proportional to 1,138.92, 1,707.11 and 1,046.66 is: 1,568.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.92 : 1,707.11 = 1,046.66 : x
  2. Step 2: Convert to fraction form
    1,138.92/1,707.11 = 1,046.66/x
  3. Step 3: Cross multiply
    1,138.92x = 1,707.11 × 1,046.66
  4. Step 4: Simplify right side
    1,138.92x = 1,786,749.98
  5. Step 5: Solve for x
    x = 1,786,749.98/1,138.92
  6. Step 6: Final answer
    x = 1,568.81

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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.