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Finding the Fourth Proportional to 539,628.10, 809,442.15 and 274,207.30

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Solution

The fourth proportional to 539,628.10, 809,442.15 and 274,207.30 is: 411,310.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,628.10 : 809,442.15 = 274,207.30 : x
  2. Step 2: Convert to fraction form
    539,628.10/809,442.15 = 274,207.30/x
  3. Step 3: Cross multiply
    539,628.10x = 809,442.15 × 274,207.30
  4. Step 4: Simplify right side
    539,628.10x = 221,954,946,457.70
  5. Step 5: Solve for x
    x = 221,954,946,457.70/539,628.10
  6. Step 6: Final answer
    x = 411,310.95

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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.