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Finding the Fourth Proportional to 378,611.28, 568,134 and 153,930.24

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Solution

The fourth proportional to 378,611.28, 568,134 and 153,930.24 is: 230,983.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,611.28 : 568,134 = 153,930.24 : x
  2. Step 2: Convert to fraction form
    378,611.28/568,134 = 153,930.24/x
  3. Step 3: Cross multiply
    378,611.28x = 568,134 × 153,930.24
  4. Step 4: Simplify right side
    378,611.28x = 87,453,002,972.16
  5. Step 5: Solve for x
    x = 87,453,002,972.16/378,611.28
  6. Step 6: Final answer
    x = 230,983.62

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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.