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Finding the Third Proportional to 170,500.50 and 258,120

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Solution

The third proportional to 170,500.50 and 258,120 is: 390,766.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,500.50 : 258,120 = 258,120 : x
  2. Step 2: Convert to fraction form
    170,500.50/258,120 = 258,120/x
  3. Step 3: Cross multiply
    170,500.50x = 258,120 × 258,120
  4. Step 4: Simplify right side
    170,500.50x = 66,625,934,400
  5. Step 5: Solve for x
    x = 66,625,934,400/170,500.50
  6. Step 6: Final answer
    x = 390,766.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.