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Finding the Third Proportional to 258,556.50 and 386,278.50

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Solution

The third proportional to 258,556.50 and 386,278.50 is: 577,092.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,556.50 : 386,278.50 = 386,278.50 : x
  2. Step 2: Convert to fraction form
    258,556.50/386,278.50 = 386,278.50/x
  3. Step 3: Cross multiply
    258,556.50x = 386,278.50 × 386,278.50
  4. Step 4: Simplify right side
    258,556.50x = 149,211,079,562.25
  5. Step 5: Solve for x
    x = 149,211,079,562.25/258,556.50
  6. Step 6: Final answer
    x = 577,092.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.