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Finding the Fourth Proportional to 431,785.79, 647,401.51 and 179,240.60

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Solution

The fourth proportional to 431,785.79, 647,401.51 and 179,240.60 is: 268,745.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,785.79 : 647,401.51 = 179,240.60 : x
  2. Step 2: Convert to fraction form
    431,785.79/647,401.51 = 179,240.60/x
  3. Step 3: Cross multiply
    431,785.79x = 647,401.51 × 179,240.60
  4. Step 4: Simplify right side
    431,785.79x = 116,040,633,294.23
  5. Step 5: Solve for x
    x = 116,040,633,294.23/431,785.79
  6. Step 6: Final answer
    x = 268,745.84

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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.