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Finding the Fourth Proportional to 321,390.54, 482,016.60 and 131,664.87

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Solution

The fourth proportional to 321,390.54, 482,016.60 and 131,664.87 is: 197,468.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,390.54 : 482,016.60 = 131,664.87 : x
  2. Step 2: Convert to fraction form
    321,390.54/482,016.60 = 131,664.87/x
  3. Step 3: Cross multiply
    321,390.54x = 482,016.60 × 131,664.87
  4. Step 4: Simplify right side
    321,390.54x = 63,464,652,976.84
  5. Step 5: Solve for x
    x = 63,464,652,976.84/321,390.54
  6. Step 6: Final answer
    x = 197,468.95

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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.