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Finding the Third Proportional to 393.75 and 476.25

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Solution

The third proportional to 393.75 and 476.25 is: 576.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.75 : 476.25 = 476.25 : x
  2. Step 2: Convert to fraction form
    393.75/476.25 = 476.25/x
  3. Step 3: Cross multiply
    393.75x = 476.25 × 476.25
  4. Step 4: Simplify right side
    393.75x = 226,814.06
  5. Step 5: Solve for x
    x = 226,814.06/393.75
  6. Step 6: Final answer
    x = 576.04

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.