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Finding the Fourth Proportional to 619,414.80, 929,813.40 and 578,806.80

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Solution

The fourth proportional to 619,414.80, 929,813.40 and 578,806.80 is: 868,856.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,414.80 : 929,813.40 = 578,806.80 : x
  2. Step 2: Convert to fraction form
    619,414.80/929,813.40 = 578,806.80/x
  3. Step 3: Cross multiply
    619,414.80x = 929,813.40 × 578,806.80
  4. Step 4: Simplify right side
    619,414.80x = 538,182,318,651.12
  5. Step 5: Solve for x
    x = 538,182,318,651.12/619,414.80
  6. Step 6: Final answer
    x = 868,856.09

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Double scale
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1.5x scale

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.