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Finding the Fourth Proportional to 1,965.74, 2,712.69 and 1,081.53

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Solution

The fourth proportional to 1,965.74, 2,712.69 and 1,081.53 is: 1,492.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.74 : 2,712.69 = 1,081.53 : x
  2. Step 2: Convert to fraction form
    1,965.74/2,712.69 = 1,081.53/x
  3. Step 3: Cross multiply
    1,965.74x = 2,712.69 × 1,081.53
  4. Step 4: Simplify right side
    1,965.74x = 2,933,855.62
  5. Step 5: Solve for x
    x = 2,933,855.62/1,965.74
  6. Step 6: Final answer
    x = 1,492.49

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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.