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Finding the Fourth Proportional to 431,529.55, 647,293.41 and 115,986.47

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Solution

The fourth proportional to 431,529.55, 647,293.41 and 115,986.47 is: 173,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,529.55 : 647,293.41 = 115,986.47 : x
  2. Step 2: Convert to fraction form
    431,529.55/647,293.41 = 115,986.47/x
  3. Step 3: Cross multiply
    431,529.55x = 647,293.41 × 115,986.47
  4. Step 4: Simplify right side
    431,529.55x = 75,077,274,443.70
  5. Step 5: Solve for x
    x = 75,077,274,443.70/431,529.55
  6. Step 6: Final answer
    x = 173,979.45

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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.