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Finding the Fourth Proportional to 579,794.40, 869,691.60 and 205,855.20

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Solution

The fourth proportional to 579,794.40, 869,691.60 and 205,855.20 is: 308,782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,794.40 : 869,691.60 = 205,855.20 : x
  2. Step 2: Convert to fraction form
    579,794.40/869,691.60 = 205,855.20/x
  3. Step 3: Cross multiply
    579,794.40x = 869,691.60 × 205,855.20
  4. Step 4: Simplify right side
    579,794.40x = 179,030,538,256.32
  5. Step 5: Solve for x
    x = 179,030,538,256.32/579,794.40
  6. Step 6: Final answer
    x = 308,782.80

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Double scale
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Similar ratio
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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.