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Finding the Third Proportional to 287,791.50 and 431,685

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Solution

The third proportional to 287,791.50 and 431,685 is: 647,524.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,791.50 : 431,685 = 431,685 : x
  2. Step 2: Convert to fraction form
    287,791.50/431,685 = 431,685/x
  3. Step 3: Cross multiply
    287,791.50x = 431,685 × 431,685
  4. Step 4: Simplify right side
    287,791.50x = 186,351,939,225
  5. Step 5: Solve for x
    x = 186,351,939,225/287,791.50
  6. Step 6: Final answer
    x = 647,524.13

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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.