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Finding the Fourth Proportional to 805,849.88, 1,208,817.94 and 206,816.20

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Solution

The fourth proportional to 805,849.88, 1,208,817.94 and 206,816.20 is: 310,235.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,849.88 : 1,208,817.94 = 206,816.20 : x
  2. Step 2: Convert to fraction form
    805,849.88/1,208,817.94 = 206,816.20/x
  3. Step 3: Cross multiply
    805,849.88x = 1,208,817.94 × 206,816.20
  4. Step 4: Simplify right side
    805,849.88x = 250,003,132,842.63
  5. Step 5: Solve for x
    x = 250,003,132,842.63/805,849.88
  6. Step 6: Final answer
    x = 310,235.37

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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.