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Finding the Third Proportional to 153.75 and 378.75

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Solution

The third proportional to 153.75 and 378.75 is: 933.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.75 : 378.75 = 378.75 : x
  2. Step 2: Convert to fraction form
    153.75/378.75 = 378.75/x
  3. Step 3: Cross multiply
    153.75x = 378.75 × 378.75
  4. Step 4: Simplify right side
    153.75x = 143,451.56
  5. Step 5: Solve for x
    x = 143,451.56/153.75
  6. Step 6: Final answer
    x = 933.02

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Why These Related Problems?

These problems maintain the same ratio (2.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.