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Finding the Third Proportional to 212,268.75 and 318,371.25

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Solution

The third proportional to 212,268.75 and 318,371.25 is: 477,509.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,268.75 : 318,371.25 = 318,371.25 : x
  2. Step 2: Convert to fraction form
    212,268.75/318,371.25 = 318,371.25/x
  3. Step 3: Cross multiply
    212,268.75x = 318,371.25 × 318,371.25
  4. Step 4: Simplify right side
    212,268.75x = 101,360,252,826.56
  5. Step 5: Solve for x
    x = 101,360,252,826.56/212,268.75
  6. Step 6: Final answer
    x = 477,509.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.