Home / 1,121.82-1,685.13-1,084.91

Finding the Fourth Proportional to 1,121.82, 1,685.13 and 1,084.91

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Solution

The fourth proportional to 1,121.82, 1,685.13 and 1,084.91 is: 1,629.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.82 : 1,685.13 = 1,084.91 : x
  2. Step 2: Convert to fraction form
    1,121.82/1,685.13 = 1,084.91/x
  3. Step 3: Cross multiply
    1,121.82x = 1,685.13 × 1,084.91
  4. Step 4: Simplify right side
    1,121.82x = 1,828,214.39
  5. Step 5: Solve for x
    x = 1,828,214.39/1,121.82
  6. Step 6: Final answer
    x = 1,629.69

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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.