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Finding the Third Proportional to 162.88 and 251.88

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Solution

The third proportional to 162.88 and 251.88 is: 389.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.88 : 251.88 = 251.88 : x
  2. Step 2: Convert to fraction form
    162.88/251.88 = 251.88/x
  3. Step 3: Cross multiply
    162.88x = 251.88 × 251.88
  4. Step 4: Simplify right side
    162.88x = 63,441.02
  5. Step 5: Solve for x
    x = 63,441.02/162.88
  6. Step 6: Final answer
    x = 389.51

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.