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Finding the Third Proportional to 120.63 and 235.25

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Solution

The third proportional to 120.63 and 235.25 is: 458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.63 : 235.25 = 235.25 : x
  2. Step 2: Convert to fraction form
    120.63/235.25 = 235.25/x
  3. Step 3: Cross multiply
    120.63x = 235.25 × 235.25
  4. Step 4: Simplify right side
    120.63x = 55,342.56
  5. Step 5: Solve for x
    x = 55,342.56/120.63
  6. Step 6: Final answer
    x = 458.80

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.