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Finding the Third Proportional to 421,665.50 and 652,202.50

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Solution

The third proportional to 421,665.50 and 652,202.50 is: 1,008,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,665.50 : 652,202.50 = 652,202.50 : x
  2. Step 2: Convert to fraction form
    421,665.50/652,202.50 = 652,202.50/x
  3. Step 3: Cross multiply
    421,665.50x = 652,202.50 × 652,202.50
  4. Step 4: Simplify right side
    421,665.50x = 425,368,101,006.25
  5. Step 5: Solve for x
    x = 425,368,101,006.25/421,665.50
  6. Step 6: Final answer
    x = 1,008,780.90

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.