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Finding the Fourth Proportional to 285,588.48, 428,529.60 and 135,998.40

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Solution

The fourth proportional to 285,588.48, 428,529.60 and 135,998.40 is: 204,067.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,588.48 : 428,529.60 = 135,998.40 : x
  2. Step 2: Convert to fraction form
    285,588.48/428,529.60 = 135,998.40/x
  3. Step 3: Cross multiply
    285,588.48x = 428,529.60 × 135,998.40
  4. Step 4: Simplify right side
    285,588.48x = 58,279,339,952.64
  5. Step 5: Solve for x
    x = 58,279,339,952.64/285,588.48
  6. Step 6: Final answer
    x = 204,067.54

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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.