Home / 2,815.52-4,217.01-1,991.30

Finding the Fourth Proportional to 2,815.52, 4,217.01 and 1,991.30

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Solution

The fourth proportional to 2,815.52, 4,217.01 and 1,991.30 is: 2,982.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.52 : 4,217.01 = 1,991.30 : x
  2. Step 2: Convert to fraction form
    2,815.52/4,217.01 = 1,991.30/x
  3. Step 3: Cross multiply
    2,815.52x = 4,217.01 × 1,991.30
  4. Step 4: Simplify right side
    2,815.52x = 8,397,332.01
  5. Step 5: Solve for x
    x = 8,397,332.01/2,815.52
  6. Step 6: Final answer
    x = 2,982.52

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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.