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Finding the Fourth Proportional to 2,761.56, 3,811.28 and 1,642.68

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Solution

The fourth proportional to 2,761.56, 3,811.28 and 1,642.68 is: 2,267.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.56 : 3,811.28 = 1,642.68 : x
  2. Step 2: Convert to fraction form
    2,761.56/3,811.28 = 1,642.68/x
  3. Step 3: Cross multiply
    2,761.56x = 3,811.28 × 1,642.68
  4. Step 4: Simplify right side
    2,761.56x = 6,260,713.43
  5. Step 5: Solve for x
    x = 6,260,713.43/2,761.56
  6. Step 6: Final answer
    x = 2,267.09

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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.