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Finding the Third Proportional to 380,172 and 531,507

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Solution

The third proportional to 380,172 and 531,507 is: 743,083.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,172 : 531,507 = 531,507 : x
  2. Step 2: Convert to fraction form
    380,172/531,507 = 531,507/x
  3. Step 3: Cross multiply
    380,172x = 531,507 × 531,507
  4. Step 4: Simplify right side
    380,172x = 282,499,691,049
  5. Step 5: Solve for x
    x = 282,499,691,049/380,172
  6. Step 6: Final answer
    x = 743,083.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.