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Finding the Fourth Proportional to 325,041.20, 486,611.40 and 231,729.20

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Solution

The fourth proportional to 325,041.20, 486,611.40 and 231,729.20 is: 346,916.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,041.20 : 486,611.40 = 231,729.20 : x
  2. Step 2: Convert to fraction form
    325,041.20/486,611.40 = 231,729.20/x
  3. Step 3: Cross multiply
    325,041.20x = 486,611.40 × 231,729.20
  4. Step 4: Simplify right side
    325,041.20x = 112,762,070,432.88
  5. Step 5: Solve for x
    x = 112,762,070,432.88/325,041.20
  6. Step 6: Final answer
    x = 346,916.24

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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.