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Finding the Fourth Proportional to 520,860.21, 781,365.20 and 161,059.16

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Solution

The fourth proportional to 520,860.21, 781,365.20 and 161,059.16 is: 241,611.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,860.21 : 781,365.20 = 161,059.16 : x
  2. Step 2: Convert to fraction form
    520,860.21/781,365.20 = 161,059.16/x
  3. Step 3: Cross multiply
    520,860.21x = 781,365.20 × 161,059.16
  4. Step 4: Simplify right side
    520,860.21x = 125,846,018,053.11
  5. Step 5: Solve for x
    x = 125,846,018,053.11/520,860.21
  6. Step 6: Final answer
    x = 241,611.89

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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.