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Finding the Fourth Proportional to 285,797.21, 394,405.56 and 156,727.51

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Solution

The fourth proportional to 285,797.21, 394,405.56 and 156,727.51 is: 216,286.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,797.21 : 394,405.56 = 156,727.51 : x
  2. Step 2: Convert to fraction form
    285,797.21/394,405.56 = 156,727.51/x
  3. Step 3: Cross multiply
    285,797.21x = 394,405.56 × 156,727.51
  4. Step 4: Simplify right side
    285,797.21x = 61,814,200,950.67
  5. Step 5: Solve for x
    x = 61,814,200,950.67/285,797.21
  6. Step 6: Final answer
    x = 216,286.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.