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Finding the Third Proportional to 189,858 and 417,609

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Solution

The third proportional to 189,858 and 417,609 is: 918,566.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,858 : 417,609 = 417,609 : x
  2. Step 2: Convert to fraction form
    189,858/417,609 = 417,609/x
  3. Step 3: Cross multiply
    189,858x = 417,609 × 417,609
  4. Step 4: Simplify right side
    189,858x = 174,397,276,881
  5. Step 5: Solve for x
    x = 174,397,276,881/189,858
  6. Step 6: Final answer
    x = 918,566.91

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.