Home / 3,212.25-4,432.91-1,815

Finding the Fourth Proportional to 3,212.25, 4,432.91 and 1,815

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Solution

The fourth proportional to 3,212.25, 4,432.91 and 1,815 is: 2,504.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.25 : 4,432.91 = 1,815 : x
  2. Step 2: Convert to fraction form
    3,212.25/4,432.91 = 1,815/x
  3. Step 3: Cross multiply
    3,212.25x = 4,432.91 × 1,815
  4. Step 4: Simplify right side
    3,212.25x = 8,045,722.58
  5. Step 5: Solve for x
    x = 8,045,722.58/3,212.25
  6. Step 6: Final answer
    x = 2,504.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.