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Finding the Fourth Proportional to 328,546.40, 492,819.60 and 128,873.30

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Solution

The fourth proportional to 328,546.40, 492,819.60 and 128,873.30 is: 193,309.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,546.40 : 492,819.60 = 128,873.30 : x
  2. Step 2: Convert to fraction form
    328,546.40/492,819.60 = 128,873.30/x
  3. Step 3: Cross multiply
    328,546.40x = 492,819.60 × 128,873.30
  4. Step 4: Simplify right side
    328,546.40x = 63,511,288,156.68
  5. Step 5: Solve for x
    x = 63,511,288,156.68/328,546.40
  6. Step 6: Final answer
    x = 193,309.95

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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.