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Finding the Fourth Proportional to 1,821.13, 2,728.90 and 1,356.73

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Solution

The fourth proportional to 1,821.13, 2,728.90 and 1,356.73 is: 2,033.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.13 : 2,728.90 = 1,356.73 : x
  2. Step 2: Convert to fraction form
    1,821.13/2,728.90 = 1,356.73/x
  3. Step 3: Cross multiply
    1,821.13x = 2,728.90 × 1,356.73
  4. Step 4: Simplify right side
    1,821.13x = 3,702,380.50
  5. Step 5: Solve for x
    x = 3,702,380.50/1,821.13
  6. Step 6: Final answer
    x = 2,033.01

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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.