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Finding the Third Proportional to 386,421 and 591,168

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Solution

The third proportional to 386,421 and 591,168 is: 904,401.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,421 : 591,168 = 591,168 : x
  2. Step 2: Convert to fraction form
    386,421/591,168 = 591,168/x
  3. Step 3: Cross multiply
    386,421x = 591,168 × 591,168
  4. Step 4: Simplify right side
    386,421x = 349,479,604,224
  5. Step 5: Solve for x
    x = 349,479,604,224/386,421
  6. Step 6: Final answer
    x = 904,401.17

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.