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Finding the Third Proportional to 3,225.75 and 4,990.50

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Solution

The third proportional to 3,225.75 and 4,990.50 is: 7,720.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,225.75 : 4,990.50 = 4,990.50 : x
  2. Step 2: Convert to fraction form
    3,225.75/4,990.50 = 4,990.50/x
  3. Step 3: Cross multiply
    3,225.75x = 4,990.50 × 4,990.50
  4. Step 4: Simplify right side
    3,225.75x = 24,905,090.25
  5. Step 5: Solve for x
    x = 24,905,090.25/3,225.75
  6. Step 6: Final answer
    x = 7,720.71

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.