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Finding the Third Proportional to 215.50 and 288

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Solution

The third proportional to 215.50 and 288 is: 384.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.50 : 288 = 288 : x
  2. Step 2: Convert to fraction form
    215.50/288 = 288/x
  3. Step 3: Cross multiply
    215.50x = 288 × 288
  4. Step 4: Simplify right side
    215.50x = 82,944
  5. Step 5: Solve for x
    x = 82,944/215.50
  6. Step 6: Final answer
    x = 384.89

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These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.