Home / 2,212.80-3,317.88-913.56

Finding the Fourth Proportional to 2,212.80, 3,317.88 and 913.56

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Solution

The fourth proportional to 2,212.80, 3,317.88 and 913.56 is: 1,369.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.80 : 3,317.88 = 913.56 : x
  2. Step 2: Convert to fraction form
    2,212.80/3,317.88 = 913.56/x
  3. Step 3: Cross multiply
    2,212.80x = 3,317.88 × 913.56
  4. Step 4: Simplify right side
    2,212.80x = 3,031,082.45
  5. Step 5: Solve for x
    x = 3,031,082.45/2,212.80
  6. Step 6: Final answer
    x = 1,369.80

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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.