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Finding the Fourth Proportional to 2,814, 4,221.06 and 866.37

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Solution

The fourth proportional to 2,814, 4,221.06 and 866.37 is: 1,299.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814 : 4,221.06 = 866.37 : x
  2. Step 2: Convert to fraction form
    2,814/4,221.06 = 866.37/x
  3. Step 3: Cross multiply
    2,814x = 4,221.06 × 866.37
  4. Step 4: Simplify right side
    2,814x = 3,656,999.75
  5. Step 5: Solve for x
    x = 3,656,999.75/2,814
  6. Step 6: Final answer
    x = 1,299.57

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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.