Home / 2,135.72-3,204.80-1,212.32

Finding the Fourth Proportional to 2,135.72, 3,204.80 and 1,212.32

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Solution

The fourth proportional to 2,135.72, 3,204.80 and 1,212.32 is: 1,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.72 : 3,204.80 = 1,212.32 : x
  2. Step 2: Convert to fraction form
    2,135.72/3,204.80 = 1,212.32/x
  3. Step 3: Cross multiply
    2,135.72x = 3,204.80 × 1,212.32
  4. Step 4: Simplify right side
    2,135.72x = 3,885,243.14
  5. Step 5: Solve for x
    x = 3,885,243.14/2,135.72
  6. Step 6: Final answer
    x = 1,819.17

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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.