Home / 457,979.20-686,968.80-394,993.60

Finding the Fourth Proportional to 457,979.20, 686,968.80 and 394,993.60

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Solution

The fourth proportional to 457,979.20, 686,968.80 and 394,993.60 is: 592,490.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,979.20 : 686,968.80 = 394,993.60 : x
  2. Step 2: Convert to fraction form
    457,979.20/686,968.80 = 394,993.60/x
  3. Step 3: Cross multiply
    457,979.20x = 686,968.80 × 394,993.60
  4. Step 4: Simplify right side
    457,979.20x = 271,348,279,399.68
  5. Step 5: Solve for x
    x = 271,348,279,399.68/457,979.20
  6. Step 6: Final answer
    x = 592,490.40

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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.