Home / 1,821.84-2,730.60-1,128.66

Finding the Fourth Proportional to 1,821.84, 2,730.60 and 1,128.66

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Solution

The fourth proportional to 1,821.84, 2,730.60 and 1,128.66 is: 1,691.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.84 : 2,730.60 = 1,128.66 : x
  2. Step 2: Convert to fraction form
    1,821.84/2,730.60 = 1,128.66/x
  3. Step 3: Cross multiply
    1,821.84x = 2,730.60 × 1,128.66
  4. Step 4: Simplify right side
    1,821.84x = 3,081,919.00
  5. Step 5: Solve for x
    x = 3,081,919.00/1,821.84
  6. Step 6: Final answer
    x = 1,691.65

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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.