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Finding the Fourth Proportional to 411,416.60, 617,124.90 and 253,131.80

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Solution

The fourth proportional to 411,416.60, 617,124.90 and 253,131.80 is: 379,697.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,416.60 : 617,124.90 = 253,131.80 : x
  2. Step 2: Convert to fraction form
    411,416.60/617,124.90 = 253,131.80/x
  3. Step 3: Cross multiply
    411,416.60x = 617,124.90 × 253,131.80
  4. Step 4: Simplify right side
    411,416.60x = 156,213,936,761.82
  5. Step 5: Solve for x
    x = 156,213,936,761.82/411,416.60
  6. Step 6: Final answer
    x = 379,697.70

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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.