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Finding the Third Proportional to 216.56 and 369.84

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Solution

The third proportional to 216.56 and 369.84 is: 631.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.56 : 369.84 = 369.84 : x
  2. Step 2: Convert to fraction form
    216.56/369.84 = 369.84/x
  3. Step 3: Cross multiply
    216.56x = 369.84 × 369.84
  4. Step 4: Simplify right side
    216.56x = 136,784.40
  5. Step 5: Solve for x
    x = 136,784.40/216.56
  6. Step 6: Final answer
    x = 631.62

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Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.