Home / 1,965.49-2,712.31-1,081.28

Finding the Fourth Proportional to 1,965.49, 2,712.31 and 1,081.28

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Solution

The fourth proportional to 1,965.49, 2,712.31 and 1,081.28 is: 1,492.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.49 : 2,712.31 = 1,081.28 : x
  2. Step 2: Convert to fraction form
    1,965.49/2,712.31 = 1,081.28/x
  3. Step 3: Cross multiply
    1,965.49x = 2,712.31 × 1,081.28
  4. Step 4: Simplify right side
    1,965.49x = 2,932,770.63
  5. Step 5: Solve for x
    x = 2,932,770.63/1,965.49
  6. Step 6: Final answer
    x = 1,492.13

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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.