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Finding the Fourth Proportional to 2,800.80, 3,867.86 and 2,538.36

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Solution

The fourth proportional to 2,800.80, 3,867.86 and 2,538.36 is: 3,505.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.80 : 3,867.86 = 2,538.36 : x
  2. Step 2: Convert to fraction form
    2,800.80/3,867.86 = 2,538.36/x
  3. Step 3: Cross multiply
    2,800.80x = 3,867.86 × 2,538.36
  4. Step 4: Simplify right side
    2,800.80x = 9,818,021.11
  5. Step 5: Solve for x
    x = 9,818,021.11/2,800.80
  6. Step 6: Final answer
    x = 3,505.43

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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.