Home / 386,057.24-579,287.78-280,314.66

Finding the Fourth Proportional to 386,057.24, 579,287.78 and 280,314.66

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Solution

The fourth proportional to 386,057.24, 579,287.78 and 280,314.66 is: 420,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,057.24 : 579,287.78 = 280,314.66 : x
  2. Step 2: Convert to fraction form
    386,057.24/579,287.78 = 280,314.66/x
  3. Step 3: Cross multiply
    386,057.24x = 579,287.78 × 280,314.66
  4. Step 4: Simplify right side
    386,057.24x = 162,382,857,092.86
  5. Step 5: Solve for x
    x = 162,382,857,092.86/386,057.24
  6. Step 6: Final answer
    x = 420,618.60

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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.