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Finding the Fourth Proportional to 419,070.60, 628,605.90 and 381,672.90

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Solution

The fourth proportional to 419,070.60, 628,605.90 and 381,672.90 is: 572,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,070.60 : 628,605.90 = 381,672.90 : x
  2. Step 2: Convert to fraction form
    419,070.60/628,605.90 = 381,672.90/x
  3. Step 3: Cross multiply
    419,070.60x = 628,605.90 × 381,672.90
  4. Step 4: Simplify right side
    419,070.60x = 239,921,836,810.11
  5. Step 5: Solve for x
    x = 239,921,836,810.11/419,070.60
  6. Step 6: Final answer
    x = 572,509.35

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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.