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Finding the Fourth Proportional to 520,889.35, 780,525.78 and 361,276.51

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Solution

The fourth proportional to 520,889.35, 780,525.78 and 361,276.51 is: 541,354.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,889.35 : 780,525.78 = 361,276.51 : x
  2. Step 2: Convert to fraction form
    520,889.35/780,525.78 = 361,276.51/x
  3. Step 3: Cross multiply
    520,889.35x = 780,525.78 × 361,276.51
  4. Step 4: Simplify right side
    520,889.35x = 281,985,629,763.43
  5. Step 5: Solve for x
    x = 281,985,629,763.43/520,889.35
  6. Step 6: Final answer
    x = 541,354.19

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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.