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Finding the Fourth Proportional to 331,197.12, 496,798.92 and 81,879.12

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Solution

The fourth proportional to 331,197.12, 496,798.92 and 81,879.12 is: 122,819.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,197.12 : 496,798.92 = 81,879.12 : x
  2. Step 2: Convert to fraction form
    331,197.12/496,798.92 = 81,879.12/x
  3. Step 3: Cross multiply
    331,197.12x = 496,798.92 × 81,879.12
  4. Step 4: Simplify right side
    331,197.12x = 40,677,458,386.55
  5. Step 5: Solve for x
    x = 40,677,458,386.55/331,197.12
  6. Step 6: Final answer
    x = 122,819.48

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1.5x scale

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.