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Finding the Fourth Proportional to 2,661.58, 3,994.80 and 2,043.28

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Solution

The fourth proportional to 2,661.58, 3,994.80 and 2,043.28 is: 3,066.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.58 : 3,994.80 = 2,043.28 : x
  2. Step 2: Convert to fraction form
    2,661.58/3,994.80 = 2,043.28/x
  3. Step 3: Cross multiply
    2,661.58x = 3,994.80 × 2,043.28
  4. Step 4: Simplify right side
    2,661.58x = 8,162,494.94
  5. Step 5: Solve for x
    x = 8,162,494.94/2,661.58
  6. Step 6: Final answer
    x = 3,066.79

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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.