Home / 2,108.85-3,160.89-1,276.11

Finding the Fourth Proportional to 2,108.85, 3,160.89 and 1,276.11

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Solution

The fourth proportional to 2,108.85, 3,160.89 and 1,276.11 is: 1,912.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.85 : 3,160.89 = 1,276.11 : x
  2. Step 2: Convert to fraction form
    2,108.85/3,160.89 = 1,276.11/x
  3. Step 3: Cross multiply
    2,108.85x = 3,160.89 × 1,276.11
  4. Step 4: Simplify right side
    2,108.85x = 4,033,643.34
  5. Step 5: Solve for x
    x = 4,033,643.34/2,108.85
  6. Step 6: Final answer
    x = 1,912.72

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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.