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Finding the Fourth Proportional to 1,819.02, 2,728.18 and 831.61

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Solution

The fourth proportional to 1,819.02, 2,728.18 and 831.61 is: 1,247.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.02 : 2,728.18 = 831.61 : x
  2. Step 2: Convert to fraction form
    1,819.02/2,728.18 = 831.61/x
  3. Step 3: Cross multiply
    1,819.02x = 2,728.18 × 831.61
  4. Step 4: Simplify right side
    1,819.02x = 2,268,781.77
  5. Step 5: Solve for x
    x = 2,268,781.77/1,819.02
  6. Step 6: Final answer
    x = 1,247.25

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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.