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Finding the Fourth Proportional to 629,638.60, 944,457.90 and 405,689.80

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Solution

The fourth proportional to 629,638.60, 944,457.90 and 405,689.80 is: 608,534.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,638.60 : 944,457.90 = 405,689.80 : x
  2. Step 2: Convert to fraction form
    629,638.60/944,457.90 = 405,689.80/x
  3. Step 3: Cross multiply
    629,638.60x = 944,457.90 × 405,689.80
  4. Step 4: Simplify right side
    629,638.60x = 383,156,936,559.42
  5. Step 5: Solve for x
    x = 383,156,936,559.42/629,638.60
  6. Step 6: Final answer
    x = 608,534.70

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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.