Home / 2,212.82-3,317.70-979.56

Finding the Fourth Proportional to 2,212.82, 3,317.70 and 979.56

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Solution

The fourth proportional to 2,212.82, 3,317.70 and 979.56 is: 1,468.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.82 : 3,317.70 = 979.56 : x
  2. Step 2: Convert to fraction form
    2,212.82/3,317.70 = 979.56/x
  3. Step 3: Cross multiply
    2,212.82x = 3,317.70 × 979.56
  4. Step 4: Simplify right side
    2,212.82x = 3,249,886.21
  5. Step 5: Solve for x
    x = 3,249,886.21/2,212.82
  6. Step 6: Final answer
    x = 1,468.66

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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.