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Finding the Fourth Proportional to 578,830.80, 868,246.20 and 521,691.60

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Solution

The fourth proportional to 578,830.80, 868,246.20 and 521,691.60 is: 782,537.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,830.80 : 868,246.20 = 521,691.60 : x
  2. Step 2: Convert to fraction form
    578,830.80/868,246.20 = 521,691.60/x
  3. Step 3: Cross multiply
    578,830.80x = 868,246.20 × 521,691.60
  4. Step 4: Simplify right side
    578,830.80x = 452,956,749,271.92
  5. Step 5: Solve for x
    x = 452,956,749,271.92/578,830.80
  6. Step 6: Final answer
    x = 782,537.40

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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.