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Finding the Third Proportional to 189,855 and 417,603

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Solution

The third proportional to 189,855 and 417,603 is: 918,555.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,855 : 417,603 = 417,603 : x
  2. Step 2: Convert to fraction form
    189,855/417,603 = 417,603/x
  3. Step 3: Cross multiply
    189,855x = 417,603 × 417,603
  4. Step 4: Simplify right side
    189,855x = 174,392,265,609
  5. Step 5: Solve for x
    x = 174,392,265,609/189,855
  6. Step 6: Final answer
    x = 918,555.03

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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.