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Finding the Fourth Proportional to 579,764.80, 869,647.20 and 411,803.20

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Solution

The fourth proportional to 579,764.80, 869,647.20 and 411,803.20 is: 617,704.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,764.80 : 869,647.20 = 411,803.20 : x
  2. Step 2: Convert to fraction form
    579,764.80/869,647.20 = 411,803.20/x
  3. Step 3: Cross multiply
    579,764.80x = 869,647.20 × 411,803.20
  4. Step 4: Simplify right side
    579,764.80x = 358,123,499,831.04
  5. Step 5: Solve for x
    x = 358,123,499,831.04/579,764.80
  6. Step 6: Final answer
    x = 617,704.80

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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.