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Finding the Fourth Proportional to 412,816.40, 619,224.60 and 255,352.40

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Solution

The fourth proportional to 412,816.40, 619,224.60 and 255,352.40 is: 383,028.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,816.40 : 619,224.60 = 255,352.40 : x
  2. Step 2: Convert to fraction form
    412,816.40/619,224.60 = 255,352.40/x
  3. Step 3: Cross multiply
    412,816.40x = 619,224.60 × 255,352.40
  4. Step 4: Simplify right side
    412,816.40x = 158,120,487,749.04
  5. Step 5: Solve for x
    x = 158,120,487,749.04/412,816.40
  6. Step 6: Final answer
    x = 383,028.60

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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.