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Finding the Fourth Proportional to 2,049, 2,827.62 and 1,221

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Solution

The fourth proportional to 2,049, 2,827.62 and 1,221 is: 1,684.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,049 : 2,827.62 = 1,221 : x
  2. Step 2: Convert to fraction form
    2,049/2,827.62 = 1,221/x
  3. Step 3: Cross multiply
    2,049x = 2,827.62 × 1,221
  4. Step 4: Simplify right side
    2,049x = 3,452,524.02
  5. Step 5: Solve for x
    x = 3,452,524.02/2,049
  6. Step 6: Final answer
    x = 1,684.98

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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.