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Finding the Third Proportional to 515,520 and 788,688

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Solution

The third proportional to 515,520 and 788,688 is: 1,206,604.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,520 : 788,688 = 788,688 : x
  2. Step 2: Convert to fraction form
    515,520/788,688 = 788,688/x
  3. Step 3: Cross multiply
    515,520x = 788,688 × 788,688
  4. Step 4: Simplify right side
    515,520x = 622,028,761,344
  5. Step 5: Solve for x
    x = 622,028,761,344/515,520
  6. Step 6: Final answer
    x = 1,206,604.52

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.