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Finding the Third Proportional to 191,210 and 420,146

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Solution

The third proportional to 191,210 and 420,146 is: 923,187.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,210 : 420,146 = 420,146 : x
  2. Step 2: Convert to fraction form
    191,210/420,146 = 420,146/x
  3. Step 3: Cross multiply
    191,210x = 420,146 × 420,146
  4. Step 4: Simplify right side
    191,210x = 176,522,661,316
  5. Step 5: Solve for x
    x = 176,522,661,316/191,210
  6. Step 6: Final answer
    x = 923,187.39

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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.