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Finding the Fourth Proportional to 318,920.40, 478,769.40 and 161,067.60

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Solution

The fourth proportional to 318,920.40, 478,769.40 and 161,067.60 is: 241,797.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,920.40 : 478,769.40 = 161,067.60 : x
  2. Step 2: Convert to fraction form
    318,920.40/478,769.40 = 161,067.60/x
  3. Step 3: Cross multiply
    318,920.40x = 478,769.40 × 161,067.60
  4. Step 4: Simplify right side
    318,920.40x = 77,114,238,211.44
  5. Step 5: Solve for x
    x = 77,114,238,211.44/318,920.40
  6. Step 6: Final answer
    x = 241,797.76

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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.