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Finding the Third Proportional to 311,493 and 487,998

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Solution

The third proportional to 311,493 and 487,998 is: 764,518.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,493 : 487,998 = 487,998 : x
  2. Step 2: Convert to fraction form
    311,493/487,998 = 487,998/x
  3. Step 3: Cross multiply
    311,493x = 487,998 × 487,998
  4. Step 4: Simplify right side
    311,493x = 238,142,048,004
  5. Step 5: Solve for x
    x = 238,142,048,004/311,493
  6. Step 6: Final answer
    x = 764,518.14

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.