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Finding the Fourth Proportional to 412,840.80, 619,844.40 and 255,376.80

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Solution

The fourth proportional to 412,840.80, 619,844.40 and 255,376.80 is: 383,425.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,840.80 : 619,844.40 = 255,376.80 : x
  2. Step 2: Convert to fraction form
    412,840.80/619,844.40 = 255,376.80/x
  3. Step 3: Cross multiply
    412,840.80x = 619,844.40 × 255,376.80
  4. Step 4: Simplify right side
    412,840.80x = 158,293,879,369.92
  5. Step 5: Solve for x
    x = 158,293,879,369.92/412,840.80
  6. Step 6: Final answer
    x = 383,425.96

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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.