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Finding the Third Proportional to 154.75 and 245

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Solution

The third proportional to 154.75 and 245 is: 387.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.75 : 245 = 245 : x
  2. Step 2: Convert to fraction form
    154.75/245 = 245/x
  3. Step 3: Cross multiply
    154.75x = 245 × 245
  4. Step 4: Simplify right side
    154.75x = 60,025
  5. Step 5: Solve for x
    x = 60,025/154.75
  6. Step 6: Final answer
    x = 387.88

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.