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Finding the Fourth Proportional to 1,494.55, 2,062.47 and 831.40

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Solution

The fourth proportional to 1,494.55, 2,062.47 and 831.40 is: 1,147.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.55 : 2,062.47 = 831.40 : x
  2. Step 2: Convert to fraction form
    1,494.55/2,062.47 = 831.40/x
  3. Step 3: Cross multiply
    1,494.55x = 2,062.47 × 831.40
  4. Step 4: Simplify right side
    1,494.55x = 1,714,737.56
  5. Step 5: Solve for x
    x = 1,714,737.56/1,494.55
  6. Step 6: Final answer
    x = 1,147.33

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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.