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Finding the Fourth Proportional to 442,840.80, 664,261.20 and 408,626.40

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Solution

The fourth proportional to 442,840.80, 664,261.20 and 408,626.40 is: 612,939.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,840.80 : 664,261.20 = 408,626.40 : x
  2. Step 2: Convert to fraction form
    442,840.80/664,261.20 = 408,626.40/x
  3. Step 3: Cross multiply
    442,840.80x = 664,261.20 × 408,626.40
  4. Step 4: Simplify right side
    442,840.80x = 271,434,662,815.68
  5. Step 5: Solve for x
    x = 271,434,662,815.68/442,840.80
  6. Step 6: Final answer
    x = 612,939.60

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Similar ratio
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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.