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Finding the Third Proportional to 4,189.50 and 6,438.38

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Solution

The third proportional to 4,189.50 and 6,438.38 is: 9,894.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,189.50 : 6,438.38 = 6,438.38 : x
  2. Step 2: Convert to fraction form
    4,189.50/6,438.38 = 6,438.38/x
  3. Step 3: Cross multiply
    4,189.50x = 6,438.38 × 6,438.38
  4. Step 4: Simplify right side
    4,189.50x = 41,452,672.64
  5. Step 5: Solve for x
    x = 41,452,672.64/4,189.50
  6. Step 6: Final answer
    x = 9,894.42

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.