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Finding the Third Proportional to 198.75 and 305.63

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Solution

The third proportional to 198.75 and 305.63 is: 469.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.75 : 305.63 = 305.63 : x
  2. Step 2: Convert to fraction form
    198.75/305.63 = 305.63/x
  3. Step 3: Cross multiply
    198.75x = 305.63 × 305.63
  4. Step 4: Simplify right side
    198.75x = 93,406.64
  5. Step 5: Solve for x
    x = 93,406.64/198.75
  6. Step 6: Final answer
    x = 469.97

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.