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Finding the Fourth Proportional to 403,626.60, 605,439.90 and 261,700.20

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Solution

The fourth proportional to 403,626.60, 605,439.90 and 261,700.20 is: 392,550.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,626.60 : 605,439.90 = 261,700.20 : x
  2. Step 2: Convert to fraction form
    403,626.60/605,439.90 = 261,700.20/x
  3. Step 3: Cross multiply
    403,626.60x = 605,439.90 × 261,700.20
  4. Step 4: Simplify right side
    403,626.60x = 158,443,742,917.98
  5. Step 5: Solve for x
    x = 158,443,742,917.98/403,626.60
  6. Step 6: Final answer
    x = 392,550.30

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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.