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Finding the Third Proportional to 148.75 and 305.75

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Solution

The third proportional to 148.75 and 305.75 is: 628.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.75 : 305.75 = 305.75 : x
  2. Step 2: Convert to fraction form
    148.75/305.75 = 305.75/x
  3. Step 3: Cross multiply
    148.75x = 305.75 × 305.75
  4. Step 4: Simplify right side
    148.75x = 93,483.06
  5. Step 5: Solve for x
    x = 93,483.06/148.75
  6. Step 6: Final answer
    x = 628.46

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.