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Finding the Fourth Proportional to 3,456.80, 4,769.03 and 2,128.20

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Solution

The fourth proportional to 3,456.80, 4,769.03 and 2,128.20 is: 2,936.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,456.80 : 4,769.03 = 2,128.20 : x
  2. Step 2: Convert to fraction form
    3,456.80/4,769.03 = 2,128.20/x
  3. Step 3: Cross multiply
    3,456.80x = 4,769.03 × 2,128.20
  4. Step 4: Simplify right side
    3,456.80x = 10,149,454.97
  5. Step 5: Solve for x
    x = 10,149,454.97/3,456.80
  6. Step 6: Final answer
    x = 2,936.08

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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.