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Finding the Third Proportional to 306,140 and 648,700

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Solution

The third proportional to 306,140 and 648,700 is: 1,374,572.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,140 : 648,700 = 648,700 : x
  2. Step 2: Convert to fraction form
    306,140/648,700 = 648,700/x
  3. Step 3: Cross multiply
    306,140x = 648,700 × 648,700
  4. Step 4: Simplify right side
    306,140x = 420,811,690,000
  5. Step 5: Solve for x
    x = 420,811,690,000/306,140
  6. Step 6: Final answer
    x = 1,374,572.71

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.