Home / 2,212.56-3,318.86-913.52

Finding the Fourth Proportional to 2,212.56, 3,318.86 and 913.52

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Solution

The fourth proportional to 2,212.56, 3,318.86 and 913.52 is: 1,370.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.56 : 3,318.86 = 913.52 : x
  2. Step 2: Convert to fraction form
    2,212.56/3,318.86 = 913.52/x
  3. Step 3: Cross multiply
    2,212.56x = 3,318.86 × 913.52
  4. Step 4: Simplify right side
    2,212.56x = 3,031,844.99
  5. Step 5: Solve for x
    x = 3,031,844.99/2,212.56
  6. Step 6: Final answer
    x = 1,370.29

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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.