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Finding the Third Proportional to 258,648 and 399,045

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Solution

The third proportional to 258,648 and 399,045 is: 615,651.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,648 : 399,045 = 399,045 : x
  2. Step 2: Convert to fraction form
    258,648/399,045 = 399,045/x
  3. Step 3: Cross multiply
    258,648x = 399,045 × 399,045
  4. Step 4: Simplify right side
    258,648x = 159,236,912,025
  5. Step 5: Solve for x
    x = 159,236,912,025/258,648
  6. Step 6: Final answer
    x = 615,651.05

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.