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Finding the Third Proportional to 318.75 and 604.50

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Solution

The third proportional to 318.75 and 604.50 is: 1,146.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.75 : 604.50 = 604.50 : x
  2. Step 2: Convert to fraction form
    318.75/604.50 = 604.50/x
  3. Step 3: Cross multiply
    318.75x = 604.50 × 604.50
  4. Step 4: Simplify right side
    318.75x = 365,420.25
  5. Step 5: Solve for x
    x = 365,420.25/318.75
  6. Step 6: Final answer
    x = 1,146.42

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.