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Finding the Fourth Proportional to 2,814.26, 4,221.40 and 866.42

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Solution

The fourth proportional to 2,814.26, 4,221.40 and 866.42 is: 1,299.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814.26 : 4,221.40 = 866.42 : x
  2. Step 2: Convert to fraction form
    2,814.26/4,221.40 = 866.42/x
  3. Step 3: Cross multiply
    2,814.26x = 4,221.40 × 866.42
  4. Step 4: Simplify right side
    2,814.26x = 3,657,505.39
  5. Step 5: Solve for x
    x = 3,657,505.39/2,814.26
  6. Step 6: Final answer
    x = 1,299.63

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1.5x scale

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.