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Finding the Fourth Proportional to 412,810.80, 619,799.40 and 255,346.80

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Solution

The fourth proportional to 412,810.80, 619,799.40 and 255,346.80 is: 383,380.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,810.80 : 619,799.40 = 255,346.80 : x
  2. Step 2: Convert to fraction form
    412,810.80/619,799.40 = 255,346.80/x
  3. Step 3: Cross multiply
    412,810.80x = 619,799.40 × 255,346.80
  4. Step 4: Simplify right side
    412,810.80x = 158,263,793,431.92
  5. Step 5: Solve for x
    x = 158,263,793,431.92/412,810.80
  6. Step 6: Final answer
    x = 383,380.94

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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.