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Finding the Fourth Proportional to 378,707.68, 568,139.28 and 154,067.56

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Solution

The fourth proportional to 378,707.68, 568,139.28 and 154,067.56 is: 231,132.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,707.68 : 568,139.28 = 154,067.56 : x
  2. Step 2: Convert to fraction form
    378,707.68/568,139.28 = 154,067.56/x
  3. Step 3: Cross multiply
    378,707.68x = 568,139.28 × 154,067.56
  4. Step 4: Simplify right side
    378,707.68x = 87,531,832,609.76
  5. Step 5: Solve for x
    x = 87,531,832,609.76/378,707.68
  6. Step 6: Final answer
    x = 231,132.97

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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.