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Finding the Third Proportional to 189,398 and 407,470

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Solution

The third proportional to 189,398 and 407,470 is: 876,629.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,398 : 407,470 = 407,470 : x
  2. Step 2: Convert to fraction form
    189,398/407,470 = 407,470/x
  3. Step 3: Cross multiply
    189,398x = 407,470 × 407,470
  4. Step 4: Simplify right side
    189,398x = 166,031,800,900
  5. Step 5: Solve for x
    x = 166,031,800,900/189,398
  6. Step 6: Final answer
    x = 876,629.11

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.