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Finding the Fourth Proportional to 658,114.80, 985,203.90 and 391,738.20

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Solution

The fourth proportional to 658,114.80, 985,203.90 and 391,738.20 is: 586,435.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,114.80 : 985,203.90 = 391,738.20 : x
  2. Step 2: Convert to fraction form
    658,114.80/985,203.90 = 391,738.20/x
  3. Step 3: Cross multiply
    658,114.80x = 985,203.90 × 391,738.20
  4. Step 4: Simplify right side
    658,114.80x = 385,942,002,418.98
  5. Step 5: Solve for x
    x = 385,942,002,418.98/658,114.80
  6. Step 6: Final answer
    x = 586,435.68

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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.