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Finding the Fourth Proportional to 432,072.80, 647,914.80 and 165,744.80

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Solution

The fourth proportional to 432,072.80, 647,914.80 and 165,744.80 is: 248,542.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,072.80 : 647,914.80 = 165,744.80 : x
  2. Step 2: Convert to fraction form
    432,072.80/647,914.80 = 165,744.80/x
  3. Step 3: Cross multiply
    432,072.80x = 647,914.80 × 165,744.80
  4. Step 4: Simplify right side
    432,072.80x = 107,388,508,943.04
  5. Step 5: Solve for x
    x = 107,388,508,943.04/432,072.80
  6. Step 6: Final answer
    x = 248,542.63

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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.