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Finding the Third Proportional to 4,258 and 5,415

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Solution

The third proportional to 4,258 and 5,415 is: 6,886.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,258 : 5,415 = 5,415 : x
  2. Step 2: Convert to fraction form
    4,258/5,415 = 5,415/x
  3. Step 3: Cross multiply
    4,258x = 5,415 × 5,415
  4. Step 4: Simplify right side
    4,258x = 29,322,225
  5. Step 5: Solve for x
    x = 29,322,225/4,258
  6. Step 6: Final answer
    x = 6,886.38

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.