Home / 1,961.92-2,707.44-1,215.64

Finding the Fourth Proportional to 1,961.92, 2,707.44 and 1,215.64

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Solution

The fourth proportional to 1,961.92, 2,707.44 and 1,215.64 is: 1,677.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.92 : 2,707.44 = 1,215.64 : x
  2. Step 2: Convert to fraction form
    1,961.92/2,707.44 = 1,215.64/x
  3. Step 3: Cross multiply
    1,961.92x = 2,707.44 × 1,215.64
  4. Step 4: Simplify right side
    1,961.92x = 3,291,272.36
  5. Step 5: Solve for x
    x = 3,291,272.36/1,961.92
  6. Step 6: Final answer
    x = 1,677.58

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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.