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Finding the Fourth Proportional to 384,203.61, 576,711.23 and 215,867.79

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Solution

The fourth proportional to 384,203.61, 576,711.23 and 215,867.79 is: 324,029.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,203.61 : 576,711.23 = 215,867.79 : x
  2. Step 2: Convert to fraction form
    384,203.61/576,711.23 = 215,867.79/x
  3. Step 3: Cross multiply
    384,203.61x = 576,711.23 × 215,867.79
  4. Step 4: Simplify right side
    384,203.61x = 124,493,377,608.94
  5. Step 5: Solve for x
    x = 124,493,377,608.94/384,203.61
  6. Step 6: Final answer
    x = 324,029.69

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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.