Home / 412,375.20-618,562.80-393,129.60

Finding the Fourth Proportional to 412,375.20, 618,562.80 and 393,129.60

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Solution

The fourth proportional to 412,375.20, 618,562.80 and 393,129.60 is: 589,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,375.20 : 618,562.80 = 393,129.60 : x
  2. Step 2: Convert to fraction form
    412,375.20/618,562.80 = 393,129.60/x
  3. Step 3: Cross multiply
    412,375.20x = 618,562.80 × 393,129.60
  4. Step 4: Simplify right side
    412,375.20x = 243,175,346,138.88
  5. Step 5: Solve for x
    x = 243,175,346,138.88/412,375.20
  6. Step 6: Final answer
    x = 589,694.40

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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.