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Finding the Fourth Proportional to 905.08, 1,249.14 and 866.74

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Solution

The fourth proportional to 905.08, 1,249.14 and 866.74 is: 1,196.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.08 : 1,249.14 = 866.74 : x
  2. Step 2: Convert to fraction form
    905.08/1,249.14 = 866.74/x
  3. Step 3: Cross multiply
    905.08x = 1,249.14 × 866.74
  4. Step 4: Simplify right side
    905.08x = 1,082,679.60
  5. Step 5: Solve for x
    x = 1,082,679.60/905.08
  6. Step 6: Final answer
    x = 1,196.23

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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.