Home / 1,821.74-2,732.69-1,089.70

Finding the Fourth Proportional to 1,821.74, 2,732.69 and 1,089.70

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Solution

The fourth proportional to 1,821.74, 2,732.69 and 1,089.70 is: 1,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.74 : 2,732.69 = 1,089.70 : x
  2. Step 2: Convert to fraction form
    1,821.74/2,732.69 = 1,089.70/x
  3. Step 3: Cross multiply
    1,821.74x = 2,732.69 × 1,089.70
  4. Step 4: Simplify right side
    1,821.74x = 2,977,817.43
  5. Step 5: Solve for x
    x = 2,977,817.43/1,821.74
  6. Step 6: Final answer
    x = 1,634.60

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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.