Home / 2,212.95-3,318.51-979.50

Finding the Fourth Proportional to 2,212.95, 3,318.51 and 979.50

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Solution

The fourth proportional to 2,212.95, 3,318.51 and 979.50 is: 1,468.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.95 : 3,318.51 = 979.50 : x
  2. Step 2: Convert to fraction form
    2,212.95/3,318.51 = 979.50/x
  3. Step 3: Cross multiply
    2,212.95x = 3,318.51 × 979.50
  4. Step 4: Simplify right side
    2,212.95x = 3,250,480.55
  5. Step 5: Solve for x
    x = 3,250,480.55/2,212.95
  6. Step 6: Final answer
    x = 1,468.85

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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.