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Finding the Third Proportional to 3,120.75 and 4,772.25

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Solution

The third proportional to 3,120.75 and 4,772.25 is: 7,297.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.75 : 4,772.25 = 4,772.25 : x
  2. Step 2: Convert to fraction form
    3,120.75/4,772.25 = 4,772.25/x
  3. Step 3: Cross multiply
    3,120.75x = 4,772.25 × 4,772.25
  4. Step 4: Simplify right side
    3,120.75x = 22,774,370.06
  5. Step 5: Solve for x
    x = 22,774,370.06/3,120.75
  6. Step 6: Final answer
    x = 7,297.72

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.