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Finding the Fourth Proportional to 331,121.60, 496,401.60 and 120,636.80

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Solution

The fourth proportional to 331,121.60, 496,401.60 and 120,636.80 is: 180,852.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,121.60 : 496,401.60 = 120,636.80 : x
  2. Step 2: Convert to fraction form
    331,121.60/496,401.60 = 120,636.80/x
  3. Step 3: Cross multiply
    331,121.60x = 496,401.60 × 120,636.80
  4. Step 4: Simplify right side
    331,121.60x = 59,884,300,538.88
  5. Step 5: Solve for x
    x = 59,884,300,538.88/331,121.60
  6. Step 6: Final answer
    x = 180,852.90

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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.