Home / 2,187.82-3,281.41-938.91

Finding the Fourth Proportional to 2,187.82, 3,281.41 and 938.91

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Solution

The fourth proportional to 2,187.82, 3,281.41 and 938.91 is: 1,408.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.82 : 3,281.41 = 938.91 : x
  2. Step 2: Convert to fraction form
    2,187.82/3,281.41 = 938.91/x
  3. Step 3: Cross multiply
    2,187.82x = 3,281.41 × 938.91
  4. Step 4: Simplify right side
    2,187.82x = 3,080,948.66
  5. Step 5: Solve for x
    x = 3,080,948.66/2,187.82
  6. Step 6: Final answer
    x = 1,408.23

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1.5x scale

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.