Home / 1,965.89-2,712.96-1,219.48

Finding the Fourth Proportional to 1,965.89, 2,712.96 and 1,219.48

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Solution

The fourth proportional to 1,965.89, 2,712.96 and 1,219.48 is: 1,682.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.89 : 2,712.96 = 1,219.48 : x
  2. Step 2: Convert to fraction form
    1,965.89/2,712.96 = 1,219.48/x
  3. Step 3: Cross multiply
    1,965.89x = 2,712.96 × 1,219.48
  4. Step 4: Simplify right side
    1,965.89x = 3,308,393.68
  5. Step 5: Solve for x
    x = 3,308,393.68/1,965.89
  6. Step 6: Final answer
    x = 1,682.90

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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.