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Finding the Third Proportional to 30,408 and 45,487

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Solution

The third proportional to 30,408 and 45,487 is: 68,043.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,408 : 45,487 = 45,487 : x
  2. Step 2: Convert to fraction form
    30,408/45,487 = 45,487/x
  3. Step 3: Cross multiply
    30,408x = 45,487 × 45,487
  4. Step 4: Simplify right side
    30,408x = 2,069,067,169
  5. Step 5: Solve for x
    x = 2,069,067,169/30,408
  6. Step 6: Final answer
    x = 68,043.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.