Home / 412,945.20-619,878.60-385,873.20

Finding the Fourth Proportional to 412,945.20, 619,878.60 and 385,873.20

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Solution

The fourth proportional to 412,945.20, 619,878.60 and 385,873.20 is: 579,240.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,945.20 : 619,878.60 = 385,873.20 : x
  2. Step 2: Convert to fraction form
    412,945.20/619,878.60 = 385,873.20/x
  3. Step 3: Cross multiply
    412,945.20x = 619,878.60 × 385,873.20
  4. Step 4: Simplify right side
    412,945.20x = 239,194,538,993.52
  5. Step 5: Solve for x
    x = 239,194,538,993.52/412,945.20
  6. Step 6: Final answer
    x = 579,240.39

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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.