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Finding the Fourth Proportional to 539,810.60, 809,715.90 and 499,260.20

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Solution

The fourth proportional to 539,810.60, 809,715.90 and 499,260.20 is: 748,890.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,810.60 : 809,715.90 = 499,260.20 : x
  2. Step 2: Convert to fraction form
    539,810.60/809,715.90 = 499,260.20/x
  3. Step 3: Cross multiply
    539,810.60x = 809,715.90 × 499,260.20
  4. Step 4: Simplify right side
    539,810.60x = 404,258,922,177.18
  5. Step 5: Solve for x
    x = 404,258,922,177.18/539,810.60
  6. Step 6: Final answer
    x = 748,890.30

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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.