Home / 2,212.31-3,318.47-913.82

Finding the Fourth Proportional to 2,212.31, 3,318.47 and 913.82

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Solution

The fourth proportional to 2,212.31, 3,318.47 and 913.82 is: 1,370.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.31 : 3,318.47 = 913.82 : x
  2. Step 2: Convert to fraction form
    2,212.31/3,318.47 = 913.82/x
  3. Step 3: Cross multiply
    2,212.31x = 3,318.47 × 913.82
  4. Step 4: Simplify right side
    2,212.31x = 3,032,466.52
  5. Step 5: Solve for x
    x = 3,032,466.52/2,212.31
  6. Step 6: Final answer
    x = 1,370.72

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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.