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Finding the Third Proportional to 5,158 and 7,289

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Solution

The third proportional to 5,158 and 7,289 is: 10,300.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158 : 7,289 = 7,289 : x
  2. Step 2: Convert to fraction form
    5,158/7,289 = 7,289/x
  3. Step 3: Cross multiply
    5,158x = 7,289 × 7,289
  4. Step 4: Simplify right side
    5,158x = 53,129,521
  5. Step 5: Solve for x
    x = 53,129,521/5,158
  6. Step 6: Final answer
    x = 10,300.41

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.