Home / 657,351.20-984,195.12-420,108.32

Finding the Fourth Proportional to 657,351.20, 984,195.12 and 420,108.32

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Solution

The fourth proportional to 657,351.20, 984,195.12 and 420,108.32 is: 628,991.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,351.20 : 984,195.12 = 420,108.32 : x
  2. Step 2: Convert to fraction form
    657,351.20/984,195.12 = 420,108.32/x
  3. Step 3: Cross multiply
    657,351.20x = 984,195.12 × 420,108.32
  4. Step 4: Simplify right side
    657,351.20x = 413,468,558,415.40
  5. Step 5: Solve for x
    x = 413,468,558,415.40/657,351.20
  6. Step 6: Final answer
    x = 628,991.87

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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.