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Finding the Third Proportional to 368,128 and 780,745

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Solution

The third proportional to 368,128 and 780,745 is: 1,655,844.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,128 : 780,745 = 780,745 : x
  2. Step 2: Convert to fraction form
    368,128/780,745 = 780,745/x
  3. Step 3: Cross multiply
    368,128x = 780,745 × 780,745
  4. Step 4: Simplify right side
    368,128x = 609,562,755,025
  5. Step 5: Solve for x
    x = 609,562,755,025/368,128
  6. Step 6: Final answer
    x = 1,655,844.58

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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.