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Finding the Fourth Proportional to 386,463.89, 579,415.58 and 259,789.92

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Solution

The fourth proportional to 386,463.89, 579,415.58 and 259,789.92 is: 389,496.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,463.89 : 579,415.58 = 259,789.92 : x
  2. Step 2: Convert to fraction form
    386,463.89/579,415.58 = 259,789.92/x
  3. Step 3: Cross multiply
    386,463.89x = 579,415.58 × 259,789.92
  4. Step 4: Simplify right side
    386,463.89x = 150,526,324,677.41
  5. Step 5: Solve for x
    x = 150,526,324,677.41/386,463.89
  6. Step 6: Final answer
    x = 389,496.48

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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.