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Finding the Fourth Proportional to 354,481.28, 489,231.18 and 225,431.94

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Solution

The fourth proportional to 354,481.28, 489,231.18 and 225,431.94 is: 311,125.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,481.28 : 489,231.18 = 225,431.94 : x
  2. Step 2: Convert to fraction form
    354,481.28/489,231.18 = 225,431.94/x
  3. Step 3: Cross multiply
    354,481.28x = 489,231.18 × 225,431.94
  4. Step 4: Simplify right side
    354,481.28x = 110,288,334,015.89
  5. Step 5: Solve for x
    x = 110,288,334,015.89/354,481.28
  6. Step 6: Final answer
    x = 311,125.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.