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Finding the Fourth Proportional to 539,808.60, 809,712.90 and 499,258.20

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Solution

The fourth proportional to 539,808.60, 809,712.90 and 499,258.20 is: 748,887.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,808.60 : 809,712.90 = 499,258.20 : x
  2. Step 2: Convert to fraction form
    539,808.60/809,712.90 = 499,258.20/x
  3. Step 3: Cross multiply
    539,808.60x = 809,712.90 × 499,258.20
  4. Step 4: Simplify right side
    539,808.60x = 404,255,804,970.78
  5. Step 5: Solve for x
    x = 404,255,804,970.78/539,808.60
  6. Step 6: Final answer
    x = 748,887.30

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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.