Home / 2,006.80-2,769.40-1,220.38

Finding the Fourth Proportional to 2,006.80, 2,769.40 and 1,220.38

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Solution

The fourth proportional to 2,006.80, 2,769.40 and 1,220.38 is: 1,684.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,006.80 : 2,769.40 = 1,220.38 : x
  2. Step 2: Convert to fraction form
    2,006.80/2,769.40 = 1,220.38/x
  3. Step 3: Cross multiply
    2,006.80x = 2,769.40 × 1,220.38
  4. Step 4: Simplify right side
    2,006.80x = 3,379,720.37
  5. Step 5: Solve for x
    x = 3,379,720.37/2,006.80
  6. Step 6: Final answer
    x = 1,684.13

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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.