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Finding the Third Proportional to 309 and 481

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Solution

The third proportional to 309 and 481 is: 748.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    309 : 481 = 481 : x
  2. Step 2: Convert to fraction form
    309/481 = 481/x
  3. Step 3: Cross multiply
    309x = 481 × 481
  4. Step 4: Simplify right side
    309x = 231,361
  5. Step 5: Solve for x
    x = 231,361/309
  6. Step 6: Final answer
    x = 748.74

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.