Home / 2,108.13-2,908.68-1,311.09

Finding the Fourth Proportional to 2,108.13, 2,908.68 and 1,311.09

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Solution

The fourth proportional to 2,108.13, 2,908.68 and 1,311.09 is: 1,808.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.13 : 2,908.68 = 1,311.09 : x
  2. Step 2: Convert to fraction form
    2,108.13/2,908.68 = 1,311.09/x
  3. Step 3: Cross multiply
    2,108.13x = 2,908.68 × 1,311.09
  4. Step 4: Simplify right side
    2,108.13x = 3,813,541.26
  5. Step 5: Solve for x
    x = 3,813,541.26/2,108.13
  6. Step 6: Final answer
    x = 1,808.97

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1.5x scale

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.