Home / 2,155.42-2,974.49-1,223.92

Finding the Fourth Proportional to 2,155.42, 2,974.49 and 1,223.92

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Solution

The fourth proportional to 2,155.42, 2,974.49 and 1,223.92 is: 1,689.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.42 : 2,974.49 = 1,223.92 : x
  2. Step 2: Convert to fraction form
    2,155.42/2,974.49 = 1,223.92/x
  3. Step 3: Cross multiply
    2,155.42x = 2,974.49 × 1,223.92
  4. Step 4: Simplify right side
    2,155.42x = 3,640,531.68
  5. Step 5: Solve for x
    x = 3,640,531.68/2,155.42
  6. Step 6: Final answer
    x = 1,689.01

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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.