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Finding the Fourth Proportional to 2,800.86, 4,201.29 and 2,640.48

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Solution

The fourth proportional to 2,800.86, 4,201.29 and 2,640.48 is: 3,960.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.86 : 4,201.29 = 2,640.48 : x
  2. Step 2: Convert to fraction form
    2,800.86/4,201.29 = 2,640.48/x
  3. Step 3: Cross multiply
    2,800.86x = 4,201.29 × 2,640.48
  4. Step 4: Simplify right side
    2,800.86x = 11,093,422.22
  5. Step 5: Solve for x
    x = 11,093,422.22/2,800.86
  6. Step 6: Final answer
    x = 3,960.72

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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.