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Finding the Fourth Proportional to 2,814.57, 4,221.87 and 866.52

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Solution

The fourth proportional to 2,814.57, 4,221.87 and 866.52 is: 1,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814.57 : 4,221.87 = 866.52 : x
  2. Step 2: Convert to fraction form
    2,814.57/4,221.87 = 866.52/x
  3. Step 3: Cross multiply
    2,814.57x = 4,221.87 × 866.52
  4. Step 4: Simplify right side
    2,814.57x = 3,658,334.79
  5. Step 5: Solve for x
    x = 3,658,334.79/2,814.57
  6. Step 6: Final answer
    x = 1,299.78

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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.