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Finding the Third Proportional to 25,678.50 and 38,415

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Solution

The third proportional to 25,678.50 and 38,415 is: 57,468.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,678.50 : 38,415 = 38,415 : x
  2. Step 2: Convert to fraction form
    25,678.50/38,415 = 38,415/x
  3. Step 3: Cross multiply
    25,678.50x = 38,415 × 38,415
  4. Step 4: Simplify right side
    25,678.50x = 1,475,712,225
  5. Step 5: Solve for x
    x = 1,475,712,225/25,678.50
  6. Step 6: Final answer
    x = 57,468.79

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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.