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Finding the Third Proportional to 161,866.50 and 253,920

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Solution

The third proportional to 161,866.50 and 253,920 is: 398,324.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,866.50 : 253,920 = 253,920 : x
  2. Step 2: Convert to fraction form
    161,866.50/253,920 = 253,920/x
  3. Step 3: Cross multiply
    161,866.50x = 253,920 × 253,920
  4. Step 4: Simplify right side
    161,866.50x = 64,475,366,400
  5. Step 5: Solve for x
    x = 64,475,366,400/161,866.50
  6. Step 6: Final answer
    x = 398,324.34

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.