Home / 1,965.71-2,712.75-1,081.58

Finding the Fourth Proportional to 1,965.71, 2,712.75 and 1,081.58

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Solution

The fourth proportional to 1,965.71, 2,712.75 and 1,081.58 is: 1,492.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.71 : 2,712.75 = 1,081.58 : x
  2. Step 2: Convert to fraction form
    1,965.71/2,712.75 = 1,081.58/x
  3. Step 3: Cross multiply
    1,965.71x = 2,712.75 × 1,081.58
  4. Step 4: Simplify right side
    1,965.71x = 2,934,037.17
  5. Step 5: Solve for x
    x = 2,934,037.17/1,965.71
  6. Step 6: Final answer
    x = 1,492.61

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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.