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Finding the Fourth Proportional to 386,558.52, 579,083.22 and 266,331.84

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Solution

The fourth proportional to 386,558.52, 579,083.22 and 266,331.84 is: 398,977.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,558.52 : 579,083.22 = 266,331.84 : x
  2. Step 2: Convert to fraction form
    386,558.52/579,083.22 = 266,331.84/x
  3. Step 3: Cross multiply
    386,558.52x = 579,083.22 × 266,331.84
  4. Step 4: Simplify right side
    386,558.52x = 154,228,299,495.73
  5. Step 5: Solve for x
    x = 154,228,299,495.73/386,558.52
  6. Step 6: Final answer
    x = 398,977.88

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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.