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Finding the Third Proportional to 391,557 and 623,049

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Solution

The third proportional to 391,557 and 623,049 is: 991,401.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,557 : 623,049 = 623,049 : x
  2. Step 2: Convert to fraction form
    391,557/623,049 = 623,049/x
  3. Step 3: Cross multiply
    391,557x = 623,049 × 623,049
  4. Step 4: Simplify right side
    391,557x = 388,190,056,401
  5. Step 5: Solve for x
    x = 388,190,056,401/391,557
  6. Step 6: Final answer
    x = 991,401.14

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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.