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Finding the Third Proportional to 3,111.75 and 4,428.75

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Solution

The third proportional to 3,111.75 and 4,428.75 is: 6,303.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.75 : 4,428.75 = 4,428.75 : x
  2. Step 2: Convert to fraction form
    3,111.75/4,428.75 = 4,428.75/x
  3. Step 3: Cross multiply
    3,111.75x = 4,428.75 × 4,428.75
  4. Step 4: Simplify right side
    3,111.75x = 19,613,826.56
  5. Step 5: Solve for x
    x = 19,613,826.56/3,111.75
  6. Step 6: Final answer
    x = 6,303.15

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.