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Finding the Fourth Proportional to 520,678.01, 780,209.19 and 361,065.28

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Solution

The fourth proportional to 520,678.01, 780,209.19 and 361,065.28 is: 541,037.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,678.01 : 780,209.19 = 361,065.28 : x
  2. Step 2: Convert to fraction form
    520,678.01/780,209.19 = 361,065.28/x
  3. Step 3: Cross multiply
    520,678.01x = 780,209.19 × 361,065.28
  4. Step 4: Simplify right side
    520,678.01x = 281,706,449,645.92
  5. Step 5: Solve for x
    x = 281,706,449,645.92/520,678.01
  6. Step 6: Final answer
    x = 541,037.73

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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.