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Finding the Third Proportional to 245 and 272.50

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Solution

The third proportional to 245 and 272.50 is: 303.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    245 : 272.50 = 272.50 : x
  2. Step 2: Convert to fraction form
    245/272.50 = 272.50/x
  3. Step 3: Cross multiply
    245x = 272.50 × 272.50
  4. Step 4: Simplify right side
    245x = 74,256.25
  5. Step 5: Solve for x
    x = 74,256.25/245
  6. Step 6: Final answer
    x = 303.09

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.