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Finding the Third Proportional to 4,390 and 5,206

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Solution

The third proportional to 4,390 and 5,206 is: 6,173.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,390 : 5,206 = 5,206 : x
  2. Step 2: Convert to fraction form
    4,390/5,206 = 5,206/x
  3. Step 3: Cross multiply
    4,390x = 5,206 × 5,206
  4. Step 4: Simplify right side
    4,390x = 27,102,436
  5. Step 5: Solve for x
    x = 27,102,436/4,390
  6. Step 6: Final answer
    x = 6,173.68

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Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.