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Finding the Fourth Proportional to 431,531.55, 647,296.41 and 115,988.47

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Solution

The fourth proportional to 431,531.55, 647,296.41 and 115,988.47 is: 173,982.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,531.55 : 647,296.41 = 115,988.47 : x
  2. Step 2: Convert to fraction form
    431,531.55/647,296.41 = 115,988.47/x
  3. Step 3: Cross multiply
    431,531.55x = 647,296.41 × 115,988.47
  4. Step 4: Simplify right side
    431,531.55x = 75,078,920,232.39
  5. Step 5: Solve for x
    x = 75,078,920,232.39/431,531.55
  6. Step 6: Final answer
    x = 173,982.46

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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.