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Finding the Third Proportional to 30,339 and 47,489

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Solution

The third proportional to 30,339 and 47,489 is: 74,333.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,339 : 47,489 = 47,489 : x
  2. Step 2: Convert to fraction form
    30,339/47,489 = 47,489/x
  3. Step 3: Cross multiply
    30,339x = 47,489 × 47,489
  4. Step 4: Simplify right side
    30,339x = 2,255,205,121
  5. Step 5: Solve for x
    x = 2,255,205,121/30,339
  6. Step 6: Final answer
    x = 74,333.54

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.