Home / 1,821.21-2,732.50-1,091.31

Finding the Fourth Proportional to 1,821.21, 2,732.50 and 1,091.31

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Solution

The fourth proportional to 1,821.21, 2,732.50 and 1,091.31 is: 1,637.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.21 : 2,732.50 = 1,091.31 : x
  2. Step 2: Convert to fraction form
    1,821.21/2,732.50 = 1,091.31/x
  3. Step 3: Cross multiply
    1,821.21x = 2,732.50 × 1,091.31
  4. Step 4: Simplify right side
    1,821.21x = 2,982,004.58
  5. Step 5: Solve for x
    x = 2,982,004.58/1,821.21
  6. Step 6: Final answer
    x = 1,637.38

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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.