Home / 1,617.45-2,231.35-1,121.11

Finding the Fourth Proportional to 1,617.45, 2,231.35 and 1,121.11

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Solution

The fourth proportional to 1,617.45, 2,231.35 and 1,121.11 is: 1,546.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.45 : 2,231.35 = 1,121.11 : x
  2. Step 2: Convert to fraction form
    1,617.45/2,231.35 = 1,121.11/x
  3. Step 3: Cross multiply
    1,617.45x = 2,231.35 × 1,121.11
  4. Step 4: Simplify right side
    1,617.45x = 2,501,588.80
  5. Step 5: Solve for x
    x = 2,501,588.80/1,617.45
  6. Step 6: Final answer
    x = 1,546.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.