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Finding the Third Proportional to 306,840 and 656,328

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Solution

The third proportional to 306,840 and 656,328 is: 1,403,879.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,840 : 656,328 = 656,328 : x
  2. Step 2: Convert to fraction form
    306,840/656,328 = 656,328/x
  3. Step 3: Cross multiply
    306,840x = 656,328 × 656,328
  4. Step 4: Simplify right side
    306,840x = 430,766,443,584
  5. Step 5: Solve for x
    x = 430,766,443,584/306,840
  6. Step 6: Final answer
    x = 1,403,879.69

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.