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Finding the Fourth Proportional to 1,494.87, 2,062.77 and 831.75

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Solution

The fourth proportional to 1,494.87, 2,062.77 and 831.75 is: 1,147.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.87 : 2,062.77 = 831.75 : x
  2. Step 2: Convert to fraction form
    1,494.87/2,062.77 = 831.75/x
  3. Step 3: Cross multiply
    1,494.87x = 2,062.77 × 831.75
  4. Step 4: Simplify right side
    1,494.87x = 1,715,708.95
  5. Step 5: Solve for x
    x = 1,715,708.95/1,494.87
  6. Step 6: Final answer
    x = 1,147.73

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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.