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Finding the Fourth Proportional to 283,758.68, 391,589.71 and 156,438.83

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Solution

The fourth proportional to 283,758.68, 391,589.71 and 156,438.83 is: 215,887.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,758.68 : 391,589.71 = 156,438.83 : x
  2. Step 2: Convert to fraction form
    283,758.68/391,589.71 = 156,438.83/x
  3. Step 3: Cross multiply
    283,758.68x = 391,589.71 × 156,438.83
  4. Step 4: Simplify right side
    283,758.68x = 61,259,836,660.32
  5. Step 5: Solve for x
    x = 61,259,836,660.32/283,758.68
  6. Step 6: Final answer
    x = 215,887.09

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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.