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Finding the Third Proportional to 191,859 and 287,787

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Solution

The third proportional to 191,859 and 287,787 is: 431,678.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,859 : 287,787 = 287,787 : x
  2. Step 2: Convert to fraction form
    191,859/287,787 = 287,787/x
  3. Step 3: Cross multiply
    191,859x = 287,787 × 287,787
  4. Step 4: Simplify right side
    191,859x = 82,821,357,369
  5. Step 5: Solve for x
    x = 82,821,357,369/191,859
  6. Step 6: Final answer
    x = 431,678.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.