Home / 3,122.43-4,305.45-2,128.29

Finding the Fourth Proportional to 3,122.43, 4,305.45 and 2,128.29

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Solution

The fourth proportional to 3,122.43, 4,305.45 and 2,128.29 is: 2,934.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.43 : 4,305.45 = 2,128.29 : x
  2. Step 2: Convert to fraction form
    3,122.43/4,305.45 = 2,128.29/x
  3. Step 3: Cross multiply
    3,122.43x = 4,305.45 × 2,128.29
  4. Step 4: Simplify right side
    3,122.43x = 9,163,246.18
  5. Step 5: Solve for x
    x = 9,163,246.18/3,122.43
  6. Step 6: Final answer
    x = 2,934.65

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1.5x scale

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.