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Finding the Fourth Proportional to 665,810.56, 998,711.34 and 266,543.56

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Solution

The fourth proportional to 665,810.56, 998,711.34 and 266,543.56 is: 399,813.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,810.56 : 998,711.34 = 266,543.56 : x
  2. Step 2: Convert to fraction form
    665,810.56/998,711.34 = 266,543.56/x
  3. Step 3: Cross multiply
    665,810.56x = 998,711.34 × 266,543.56
  4. Step 4: Simplify right side
    665,810.56x = 266,200,075,975.97
  5. Step 5: Solve for x
    x = 266,200,075,975.97/665,810.56
  6. Step 6: Final answer
    x = 399,813.54

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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.