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Finding the Third Proportional to 259,221 and 423,283.50

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Solution

The third proportional to 259,221 and 423,283.50 is: 691,182.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,221 : 423,283.50 = 423,283.50 : x
  2. Step 2: Convert to fraction form
    259,221/423,283.50 = 423,283.50/x
  3. Step 3: Cross multiply
    259,221x = 423,283.50 × 423,283.50
  4. Step 4: Simplify right side
    259,221x = 179,168,921,372.25
  5. Step 5: Solve for x
    x = 179,168,921,372.25/259,221
  6. Step 6: Final answer
    x = 691,182.12

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.