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Finding the Third Proportional to 217,221.75 and 322,447.50

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Solution

The third proportional to 217,221.75 and 322,447.50 is: 478,646.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,221.75 : 322,447.50 = 322,447.50 : x
  2. Step 2: Convert to fraction form
    217,221.75/322,447.50 = 322,447.50/x
  3. Step 3: Cross multiply
    217,221.75x = 322,447.50 × 322,447.50
  4. Step 4: Simplify right side
    217,221.75x = 103,972,390,256.25
  5. Step 5: Solve for x
    x = 103,972,390,256.25/217,221.75
  6. Step 6: Final answer
    x = 478,646.32

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.