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Finding the Fourth Proportional to 519,806.40, 779,968.80 and 295,339.20

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Solution

The fourth proportional to 519,806.40, 779,968.80 and 295,339.20 is: 443,156.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,806.40 : 779,968.80 = 295,339.20 : x
  2. Step 2: Convert to fraction form
    519,806.40/779,968.80 = 295,339.20/x
  3. Step 3: Cross multiply
    519,806.40x = 779,968.80 × 295,339.20
  4. Step 4: Simplify right side
    519,806.40x = 230,355,361,416.96
  5. Step 5: Solve for x
    x = 230,355,361,416.96/519,806.40
  6. Step 6: Final answer
    x = 443,156.07

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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.