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Finding the Fourth Proportional to 2,814.27, 4,221.81 and 866.64

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Solution

The fourth proportional to 2,814.27, 4,221.81 and 866.64 is: 1,300.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814.27 : 4,221.81 = 866.64 : x
  2. Step 2: Convert to fraction form
    2,814.27/4,221.81 = 866.64/x
  3. Step 3: Cross multiply
    2,814.27x = 4,221.81 × 866.64
  4. Step 4: Simplify right side
    2,814.27x = 3,658,789.42
  5. Step 5: Solve for x
    x = 3,658,789.42/2,814.27
  6. Step 6: Final answer
    x = 1,300.08

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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.