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Finding the Fourth Proportional to 1,494.31, 2,062.10 and 831.14

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Solution

The fourth proportional to 1,494.31, 2,062.10 and 831.14 is: 1,146.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.31 : 2,062.10 = 831.14 : x
  2. Step 2: Convert to fraction form
    1,494.31/2,062.10 = 831.14/x
  3. Step 3: Cross multiply
    1,494.31x = 2,062.10 × 831.14
  4. Step 4: Simplify right side
    1,494.31x = 1,713,889.64
  5. Step 5: Solve for x
    x = 1,713,889.64/1,494.31
  6. Step 6: Final answer
    x = 1,146.95

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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.