Home / 2,195.39-3,029.10-1,311

Finding the Fourth Proportional to 2,195.39, 3,029.10 and 1,311

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Solution

The fourth proportional to 2,195.39, 3,029.10 and 1,311 is: 1,808.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,195.39 : 3,029.10 = 1,311 : x
  2. Step 2: Convert to fraction form
    2,195.39/3,029.10 = 1,311/x
  3. Step 3: Cross multiply
    2,195.39x = 3,029.10 × 1,311
  4. Step 4: Simplify right side
    2,195.39x = 3,971,150.10
  5. Step 5: Solve for x
    x = 3,971,150.10/2,195.39
  6. Step 6: Final answer
    x = 1,808.86

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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.