Home / 2,640.85-3,651.33-2,312.80

Finding the Fourth Proportional to 2,640.85, 3,651.33 and 2,312.80

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Solution

The fourth proportional to 2,640.85, 3,651.33 and 2,312.80 is: 3,197.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.85 : 3,651.33 = 2,312.80 : x
  2. Step 2: Convert to fraction form
    2,640.85/3,651.33 = 2,312.80/x
  3. Step 3: Cross multiply
    2,640.85x = 3,651.33 × 2,312.80
  4. Step 4: Simplify right side
    2,640.85x = 8,444,796.02
  5. Step 5: Solve for x
    x = 8,444,796.02/2,640.85
  6. Step 6: Final answer
    x = 3,197.76

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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.