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Finding the Third Proportional to 272.50 and 622.88

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Solution

The third proportional to 272.50 and 622.88 is: 1,423.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.50 : 622.88 = 622.88 : x
  2. Step 2: Convert to fraction form
    272.50/622.88 = 622.88/x
  3. Step 3: Cross multiply
    272.50x = 622.88 × 622.88
  4. Step 4: Simplify right side
    272.50x = 387,973.27
  5. Step 5: Solve for x
    x = 387,973.27/272.50
  6. Step 6: Final answer
    x = 1,423.76

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Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.