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Finding the Fourth Proportional to 665,998.89, 998,911.77 and 266,643.59

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Solution

The fourth proportional to 665,998.89, 998,911.77 and 266,643.59 is: 399,930.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,998.89 : 998,911.77 = 266,643.59 : x
  2. Step 2: Convert to fraction form
    665,998.89/998,911.77 = 266,643.59/x
  3. Step 3: Cross multiply
    665,998.89x = 998,911.77 × 266,643.59
  4. Step 4: Simplify right side
    665,998.89x = 266,353,415,451.50
  5. Step 5: Solve for x
    x = 266,353,415,451.50/665,998.89
  6. Step 6: Final answer
    x = 399,930.72

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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.