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Finding the Third Proportional to 4,415 and 7,028

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Solution

The third proportional to 4,415 and 7,028 is: 11,187.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,415 : 7,028 = 7,028 : x
  2. Step 2: Convert to fraction form
    4,415/7,028 = 7,028/x
  3. Step 3: Cross multiply
    4,415x = 7,028 × 7,028
  4. Step 4: Simplify right side
    4,415x = 49,392,784
  5. Step 5: Solve for x
    x = 49,392,784/4,415
  6. Step 6: Final answer
    x = 11,187.49

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.