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Finding the Fourth Proportional to 411,411.60, 617,117.40 and 253,126.80

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Solution

The fourth proportional to 411,411.60, 617,117.40 and 253,126.80 is: 379,690.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,411.60 : 617,117.40 = 253,126.80 : x
  2. Step 2: Convert to fraction form
    411,411.60/617,117.40 = 253,126.80/x
  3. Step 3: Cross multiply
    411,411.60x = 617,117.40 × 253,126.80
  4. Step 4: Simplify right side
    411,411.60x = 156,208,952,686.32
  5. Step 5: Solve for x
    x = 156,208,952,686.32/411,411.60
  6. Step 6: Final answer
    x = 379,690.20

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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.