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Finding the Fourth Proportional to 714,197.48, 985,589.78 and 391,912.96

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Solution

The fourth proportional to 714,197.48, 985,589.78 and 391,912.96 is: 540,838.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,197.48 : 985,589.78 = 391,912.96 : x
  2. Step 2: Convert to fraction form
    714,197.48/985,589.78 = 391,912.96/x
  3. Step 3: Cross multiply
    714,197.48x = 985,589.78 × 391,912.96
  4. Step 4: Simplify right side
    714,197.48x = 386,265,408,025.55
  5. Step 5: Solve for x
    x = 386,265,408,025.55/714,197.48
  6. Step 6: Final answer
    x = 540,838.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.