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Finding the Fourth Proportional to 519,941.20, 779,911.80 and 496,613.20

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Solution

The fourth proportional to 519,941.20, 779,911.80 and 496,613.20 is: 744,919.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,941.20 : 779,911.80 = 496,613.20 : x
  2. Step 2: Convert to fraction form
    519,941.20/779,911.80 = 496,613.20/x
  3. Step 3: Cross multiply
    519,941.20x = 779,911.80 × 496,613.20
  4. Step 4: Simplify right side
    519,941.20x = 387,314,494,715.76
  5. Step 5: Solve for x
    x = 387,314,494,715.76/519,941.20
  6. Step 6: Final answer
    x = 744,919.80

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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.