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Finding the Third Proportional to 216.94 and 305.72

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Solution

The third proportional to 216.94 and 305.72 is: 430.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.94 : 305.72 = 305.72 : x
  2. Step 2: Convert to fraction form
    216.94/305.72 = 305.72/x
  3. Step 3: Cross multiply
    216.94x = 305.72 × 305.72
  4. Step 4: Simplify right side
    216.94x = 93,463.95
  5. Step 5: Solve for x
    x = 93,463.95/216.94
  6. Step 6: Final answer
    x = 430.83

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.