Home / 1,220.36-1,821.69-1,134.91

Finding the Fourth Proportional to 1,220.36, 1,821.69 and 1,134.91

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Solution

The fourth proportional to 1,220.36, 1,821.69 and 1,134.91 is: 1,694.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.36 : 1,821.69 = 1,134.91 : x
  2. Step 2: Convert to fraction form
    1,220.36/1,821.69 = 1,134.91/x
  3. Step 3: Cross multiply
    1,220.36x = 1,821.69 × 1,134.91
  4. Step 4: Simplify right side
    1,220.36x = 2,067,454.20
  5. Step 5: Solve for x
    x = 2,067,454.20/1,220.36
  6. Step 6: Final answer
    x = 1,694.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.