Home / 2,780.81-3,836.87-1,662.11

Finding the Fourth Proportional to 2,780.81, 3,836.87 and 1,662.11

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Solution

The fourth proportional to 2,780.81, 3,836.87 and 1,662.11 is: 2,293.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.81 : 3,836.87 = 1,662.11 : x
  2. Step 2: Convert to fraction form
    2,780.81/3,836.87 = 1,662.11/x
  3. Step 3: Cross multiply
    2,780.81x = 3,836.87 × 1,662.11
  4. Step 4: Simplify right side
    2,780.81x = 6,377,272.50
  5. Step 5: Solve for x
    x = 6,377,272.50/2,780.81
  6. Step 6: Final answer
    x = 2,293.32

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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.