Home / 2,107.20-3,160.80-1,011.30

Finding the Fourth Proportional to 2,107.20, 3,160.80 and 1,011.30

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Solution

The fourth proportional to 2,107.20, 3,160.80 and 1,011.30 is: 1,516.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.20 : 3,160.80 = 1,011.30 : x
  2. Step 2: Convert to fraction form
    2,107.20/3,160.80 = 1,011.30/x
  3. Step 3: Cross multiply
    2,107.20x = 3,160.80 × 1,011.30
  4. Step 4: Simplify right side
    2,107.20x = 3,196,517.04
  5. Step 5: Solve for x
    x = 3,196,517.04/2,107.20
  6. Step 6: Final answer
    x = 1,516.95

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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.