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Finding the Fourth Proportional to 866,216.88, 1,299,310.80 and 259,006.56

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Solution

The fourth proportional to 866,216.88, 1,299,310.80 and 259,006.56 is: 388,505.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,216.88 : 1,299,310.80 = 259,006.56 : x
  2. Step 2: Convert to fraction form
    866,216.88/1,299,310.80 = 259,006.56/x
  3. Step 3: Cross multiply
    866,216.88x = 1,299,310.80 × 259,006.56
  4. Step 4: Simplify right side
    866,216.88x = 336,530,020,678.85
  5. Step 5: Solve for x
    x = 336,530,020,678.85/866,216.88
  6. Step 6: Final answer
    x = 388,505.50

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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.