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Finding the Fourth Proportional to 539,585.40, 809,378.10 and 434,609.40

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Solution

The fourth proportional to 539,585.40, 809,378.10 and 434,609.40 is: 651,914.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,585.40 : 809,378.10 = 434,609.40 : x
  2. Step 2: Convert to fraction form
    539,585.40/809,378.10 = 434,609.40/x
  3. Step 3: Cross multiply
    539,585.40x = 809,378.10 × 434,609.40
  4. Step 4: Simplify right side
    539,585.40x = 351,763,330,414.14
  5. Step 5: Solve for x
    x = 351,763,330,414.14/539,585.40
  6. Step 6: Final answer
    x = 651,914.10

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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.