Home / 3,834.02-5,290.80-2,155.70

Finding the Fourth Proportional to 3,834.02, 5,290.80 and 2,155.70

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Solution

The fourth proportional to 3,834.02, 5,290.80 and 2,155.70 is: 2,974.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,834.02 : 5,290.80 = 2,155.70 : x
  2. Step 2: Convert to fraction form
    3,834.02/5,290.80 = 2,155.70/x
  3. Step 3: Cross multiply
    3,834.02x = 5,290.80 × 2,155.70
  4. Step 4: Simplify right side
    3,834.02x = 11,405,377.56
  5. Step 5: Solve for x
    x = 11,405,377.56/3,834.02
  6. Step 6: Final answer
    x = 2,974.78

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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.