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Finding the Fourth Proportional to 321,628.20, 482,039.10 and 163,919.40

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Solution

The fourth proportional to 321,628.20, 482,039.10 and 163,919.40 is: 245,673.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,628.20 : 482,039.10 = 163,919.40 : x
  2. Step 2: Convert to fraction form
    321,628.20/482,039.10 = 163,919.40/x
  3. Step 3: Cross multiply
    321,628.20x = 482,039.10 × 163,919.40
  4. Step 4: Simplify right side
    321,628.20x = 79,015,560,048.54
  5. Step 5: Solve for x
    x = 79,015,560,048.54/321,628.20
  6. Step 6: Final answer
    x = 245,673.61

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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.