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Finding the Third Proportional to 28,415 and 43,487

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Solution

The third proportional to 28,415 and 43,487 is: 66,553.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415 : 43,487 = 43,487 : x
  2. Step 2: Convert to fraction form
    28,415/43,487 = 43,487/x
  3. Step 3: Cross multiply
    28,415x = 43,487 × 43,487
  4. Step 4: Simplify right side
    28,415x = 1,891,119,169
  5. Step 5: Solve for x
    x = 1,891,119,169/28,415
  6. Step 6: Final answer
    x = 66,553.55

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.