Home / 657,977.20-985,216.20-420,031.60

Finding the Fourth Proportional to 657,977.20, 985,216.20 and 420,031.60

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Solution

The fourth proportional to 657,977.20, 985,216.20 and 420,031.60 is: 628,930.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,977.20 : 985,216.20 = 420,031.60 : x
  2. Step 2: Convert to fraction form
    657,977.20/985,216.20 = 420,031.60/x
  3. Step 3: Cross multiply
    657,977.20x = 985,216.20 × 420,031.60
  4. Step 4: Simplify right side
    657,977.20x = 413,821,936,831.92
  5. Step 5: Solve for x
    x = 413,821,936,831.92/657,977.20
  6. Step 6: Final answer
    x = 628,930.51

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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.