Home / 439,816.20-659,724.30-389,077.80

Finding the Fourth Proportional to 439,816.20, 659,724.30 and 389,077.80

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Solution

The fourth proportional to 439,816.20, 659,724.30 and 389,077.80 is: 583,616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,816.20 : 659,724.30 = 389,077.80 : x
  2. Step 2: Convert to fraction form
    439,816.20/659,724.30 = 389,077.80/x
  3. Step 3: Cross multiply
    439,816.20x = 659,724.30 × 389,077.80
  4. Step 4: Simplify right side
    439,816.20x = 256,684,079,250.54
  5. Step 5: Solve for x
    x = 256,684,079,250.54/439,816.20
  6. Step 6: Final answer
    x = 583,616.70

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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.