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Finding the Third Proportional to 3,438 and 4,778.50

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Solution

The third proportional to 3,438 and 4,778.50 is: 6,641.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438 : 4,778.50 = 4,778.50 : x
  2. Step 2: Convert to fraction form
    3,438/4,778.50 = 4,778.50/x
  3. Step 3: Cross multiply
    3,438x = 4,778.50 × 4,778.50
  4. Step 4: Simplify right side
    3,438x = 22,834,062.25
  5. Step 5: Solve for x
    x = 22,834,062.25/3,438
  6. Step 6: Final answer
    x = 6,641.67

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.