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Finding the Fourth Proportional to 628,861.80, 943,292.70 and 376,919.40

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Solution

The fourth proportional to 628,861.80, 943,292.70 and 376,919.40 is: 565,379.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,861.80 : 943,292.70 = 376,919.40 : x
  2. Step 2: Convert to fraction form
    628,861.80/943,292.70 = 376,919.40/x
  3. Step 3: Cross multiply
    628,861.80x = 943,292.70 × 376,919.40
  4. Step 4: Simplify right side
    628,861.80x = 355,545,318,508.38
  5. Step 5: Solve for x
    x = 355,545,318,508.38/628,861.80
  6. Step 6: Final answer
    x = 565,379.10

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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.