Home / 3,131.57-4,702.73-2,780.97

Finding the Fourth Proportional to 3,131.57, 4,702.73 and 2,780.97

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Solution

The fourth proportional to 3,131.57, 4,702.73 and 2,780.97 is: 4,176.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.57 : 4,702.73 = 2,780.97 : x
  2. Step 2: Convert to fraction form
    3,131.57/4,702.73 = 2,780.97/x
  3. Step 3: Cross multiply
    3,131.57x = 4,702.73 × 2,780.97
  4. Step 4: Simplify right side
    3,131.57x = 13,078,151.05
  5. Step 5: Solve for x
    x = 13,078,151.05/3,131.57
  6. Step 6: Final answer
    x = 4,176.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.