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Finding the Third Proportional to 316.88 and 477.75

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Solution

The third proportional to 316.88 and 477.75 is: 720.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.88 : 477.75 = 477.75 : x
  2. Step 2: Convert to fraction form
    316.88/477.75 = 477.75/x
  3. Step 3: Cross multiply
    316.88x = 477.75 × 477.75
  4. Step 4: Simplify right side
    316.88x = 228,245.06
  5. Step 5: Solve for x
    x = 228,245.06/316.88
  6. Step 6: Final answer
    x = 720.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.