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Finding the Third Proportional to 30,278 and 45,427

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Solution

The third proportional to 30,278 and 45,427 is: 68,155.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,278 : 45,427 = 45,427 : x
  2. Step 2: Convert to fraction form
    30,278/45,427 = 45,427/x
  3. Step 3: Cross multiply
    30,278x = 45,427 × 45,427
  4. Step 4: Simplify right side
    30,278x = 2,063,612,329
  5. Step 5: Solve for x
    x = 2,063,612,329/30,278
  6. Step 6: Final answer
    x = 68,155.50

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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.