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Finding the Third Proportional to 30,489 and 47,517

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Solution

The third proportional to 30,489 and 47,517 is: 74,055.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,489 : 47,517 = 47,517 : x
  2. Step 2: Convert to fraction form
    30,489/47,517 = 47,517/x
  3. Step 3: Cross multiply
    30,489x = 47,517 × 47,517
  4. Step 4: Simplify right side
    30,489x = 2,257,865,289
  5. Step 5: Solve for x
    x = 2,257,865,289/30,489
  6. Step 6: Final answer
    x = 74,055.08

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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.