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Finding the Third Proportional to 275,553.75 and 390,016.13

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Solution

The third proportional to 275,553.75 and 390,016.13 is: 552,025.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,553.75 : 390,016.13 = 390,016.13 : x
  2. Step 2: Convert to fraction form
    275,553.75/390,016.13 = 390,016.13/x
  3. Step 3: Cross multiply
    275,553.75x = 390,016.13 × 390,016.13
  4. Step 4: Simplify right side
    275,553.75x = 152,112,577,760.02
  5. Step 5: Solve for x
    x = 152,112,577,760.02/275,553.75
  6. Step 6: Final answer
    x = 552,025.07

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.