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Finding the Fourth Proportional to 714,212.96, 985,611.20 and 391,928.48

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Solution

The fourth proportional to 714,212.96, 985,611.20 and 391,928.48 is: 540,859.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,212.96 : 985,611.20 = 391,928.48 : x
  2. Step 2: Convert to fraction form
    714,212.96/985,611.20 = 391,928.48/x
  3. Step 3: Cross multiply
    714,212.96x = 985,611.20 × 391,928.48
  4. Step 4: Simplify right side
    714,212.96x = 386,289,099,486.98
  5. Step 5: Solve for x
    x = 386,289,099,486.98/714,212.96
  6. Step 6: Final answer
    x = 540,859.83

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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.