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Finding the Fourth Proportional to 331,125.60, 496,407.60 and 120,640.80

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Solution

The fourth proportional to 331,125.60, 496,407.60 and 120,640.80 is: 180,858.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,125.60 : 496,407.60 = 120,640.80 : x
  2. Step 2: Convert to fraction form
    331,125.60/496,407.60 = 120,640.80/x
  3. Step 3: Cross multiply
    331,125.60x = 496,407.60 × 120,640.80
  4. Step 4: Simplify right side
    331,125.60x = 59,887,009,990.08
  5. Step 5: Solve for x
    x = 59,887,009,990.08/331,125.60
  6. Step 6: Final answer
    x = 180,858.89

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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.