Home / 2,212.58-3,318.37-979.32

Finding the Fourth Proportional to 2,212.58, 3,318.37 and 979.32

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Solution

The fourth proportional to 2,212.58, 3,318.37 and 979.32 is: 1,468.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.58 : 3,318.37 = 979.32 : x
  2. Step 2: Convert to fraction form
    2,212.58/3,318.37 = 979.32/x
  3. Step 3: Cross multiply
    2,212.58x = 3,318.37 × 979.32
  4. Step 4: Simplify right side
    2,212.58x = 3,249,756.10
  5. Step 5: Solve for x
    x = 3,249,756.10/2,212.58
  6. Step 6: Final answer
    x = 1,468.76

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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.