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Finding the Fourth Proportional to 509,911.40, 764,867.10 and 341,949.80

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Solution

The fourth proportional to 509,911.40, 764,867.10 and 341,949.80 is: 512,924.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,911.40 : 764,867.10 = 341,949.80 : x
  2. Step 2: Convert to fraction form
    509,911.40/764,867.10 = 341,949.80/x
  3. Step 3: Cross multiply
    509,911.40x = 764,867.10 × 341,949.80
  4. Step 4: Simplify right side
    509,911.40x = 261,546,151,871.58
  5. Step 5: Solve for x
    x = 261,546,151,871.58/509,911.40
  6. Step 6: Final answer
    x = 512,924.70

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Half scale
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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.