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Finding the Fourth Proportional to 431,495.88, 647,243.24 and 115,952.80

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Solution

The fourth proportional to 431,495.88, 647,243.24 and 115,952.80 is: 173,929.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,495.88 : 647,243.24 = 115,952.80 : x
  2. Step 2: Convert to fraction form
    431,495.88/647,243.24 = 115,952.80/x
  3. Step 3: Cross multiply
    431,495.88x = 647,243.24 × 115,952.80
  4. Step 4: Simplify right side
    431,495.88x = 75,049,665,959.07
  5. Step 5: Solve for x
    x = 75,049,665,959.07/431,495.88
  6. Step 6: Final answer
    x = 173,929.04

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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.