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Finding the Third Proportional to 189,434 and 315,679

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Solution

The third proportional to 189,434 and 315,679 is: 526,057.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,434 : 315,679 = 315,679 : x
  2. Step 2: Convert to fraction form
    189,434/315,679 = 315,679/x
  3. Step 3: Cross multiply
    189,434x = 315,679 × 315,679
  4. Step 4: Simplify right side
    189,434x = 99,653,231,041
  5. Step 5: Solve for x
    x = 99,653,231,041/189,434
  6. Step 6: Final answer
    x = 526,057.79

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.