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Finding the Fourth Proportional to 321,900.80, 482,659.20 and 197,331.20

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Solution

The fourth proportional to 321,900.80, 482,659.20 and 197,331.20 is: 295,879.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,900.80 : 482,659.20 = 197,331.20 : x
  2. Step 2: Convert to fraction form
    321,900.80/482,659.20 = 197,331.20/x
  3. Step 3: Cross multiply
    321,900.80x = 482,659.20 × 197,331.20
  4. Step 4: Simplify right side
    321,900.80x = 95,243,719,127.04
  5. Step 5: Solve for x
    x = 95,243,719,127.04/321,900.80
  6. Step 6: Final answer
    x = 295,879.10

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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.