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Finding the Fourth Proportional to 1,282.96, 1,926.36 and 1,221.19

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Solution

The fourth proportional to 1,282.96, 1,926.36 and 1,221.19 is: 1,833.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.96 : 1,926.36 = 1,221.19 : x
  2. Step 2: Convert to fraction form
    1,282.96/1,926.36 = 1,221.19/x
  3. Step 3: Cross multiply
    1,282.96x = 1,926.36 × 1,221.19
  4. Step 4: Simplify right side
    1,282.96x = 2,352,451.57
  5. Step 5: Solve for x
    x = 2,352,451.57/1,282.96
  6. Step 6: Final answer
    x = 1,833.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.