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Finding the Fourth Proportional to 412,711.20, 618,483.60 and 254,469.60

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Solution

The fourth proportional to 412,711.20, 618,483.60 and 254,469.60 is: 381,344.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,711.20 : 618,483.60 = 254,469.60 : x
  2. Step 2: Convert to fraction form
    412,711.20/618,483.60 = 254,469.60/x
  3. Step 3: Cross multiply
    412,711.20x = 618,483.60 × 254,469.60
  4. Step 4: Simplify right side
    412,711.20x = 157,385,274,298.56
  5. Step 5: Solve for x
    x = 157,385,274,298.56/412,711.20
  6. Step 6: Final answer
    x = 381,344.81

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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.