Home / 657,981.20-985,222.20-420,035.60

Finding the Fourth Proportional to 657,981.20, 985,222.20 and 420,035.60

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Solution

The fourth proportional to 657,981.20, 985,222.20 and 420,035.60 is: 628,936.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,981.20 : 985,222.20 = 420,035.60 : x
  2. Step 2: Convert to fraction form
    657,981.20/985,222.20 = 420,035.60/x
  3. Step 3: Cross multiply
    657,981.20x = 985,222.20 × 420,035.60
  4. Step 4: Simplify right side
    657,981.20x = 413,828,397,910.32
  5. Step 5: Solve for x
    x = 413,828,397,910.32/657,981.20
  6. Step 6: Final answer
    x = 628,936.51

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Double scale
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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.