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Finding the Fourth Proportional to 1,494.25, 2,062.13 and 831.09

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Solution

The fourth proportional to 1,494.25, 2,062.13 and 831.09 is: 1,146.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.25 : 2,062.13 = 831.09 : x
  2. Step 2: Convert to fraction form
    1,494.25/2,062.13 = 831.09/x
  3. Step 3: Cross multiply
    1,494.25x = 2,062.13 × 831.09
  4. Step 4: Simplify right side
    1,494.25x = 1,713,819.20
  5. Step 5: Solve for x
    x = 1,713,819.20/1,494.25
  6. Step 6: Final answer
    x = 1,146.94

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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.