Home / 1,961.21-2,707.73-1,215.96

Finding the Fourth Proportional to 1,961.21, 2,707.73 and 1,215.96

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Solution

The fourth proportional to 1,961.21, 2,707.73 and 1,215.96 is: 1,678.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.21 : 2,707.73 = 1,215.96 : x
  2. Step 2: Convert to fraction form
    1,961.21/2,707.73 = 1,215.96/x
  3. Step 3: Cross multiply
    1,961.21x = 2,707.73 × 1,215.96
  4. Step 4: Simplify right side
    1,961.21x = 3,292,477.83
  5. Step 5: Solve for x
    x = 3,292,477.83/1,961.21
  6. Step 6: Final answer
    x = 1,678.80

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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.