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Finding the Fourth Proportional to 386,171.74, 579,651.27 and 266,236.66

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Solution

The fourth proportional to 386,171.74, 579,651.27 and 266,236.66 is: 399,626.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,171.74 : 579,651.27 = 266,236.66 : x
  2. Step 2: Convert to fraction form
    386,171.74/579,651.27 = 266,236.66/x
  3. Step 3: Cross multiply
    386,171.74x = 579,651.27 × 266,236.66
  4. Step 4: Simplify right side
    386,171.74x = 154,324,418,089.56
  5. Step 5: Solve for x
    x = 154,324,418,089.56/386,171.74
  6. Step 6: Final answer
    x = 399,626.39

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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.