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Finding the Fourth Proportional to 1,821.77, 2,728.49 and 1,089.84

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Solution

The fourth proportional to 1,821.77, 2,728.49 and 1,089.84 is: 1,632.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.77 : 2,728.49 = 1,089.84 : x
  2. Step 2: Convert to fraction form
    1,821.77/2,728.49 = 1,089.84/x
  3. Step 3: Cross multiply
    1,821.77x = 2,728.49 × 1,089.84
  4. Step 4: Simplify right side
    1,821.77x = 2,973,612.09
  5. Step 5: Solve for x
    x = 2,973,612.09/1,821.77
  6. Step 6: Final answer
    x = 1,632.27

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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.