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Finding the Fourth Proportional to 288,791.90, 398,372.80 and 167,919.83

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Solution

The fourth proportional to 288,791.90, 398,372.80 and 167,919.83 is: 231,636.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,791.90 : 398,372.80 = 167,919.83 : x
  2. Step 2: Convert to fraction form
    288,791.90/398,372.80 = 167,919.83/x
  3. Step 3: Cross multiply
    288,791.90x = 398,372.80 × 167,919.83
  4. Step 4: Simplify right side
    288,791.90x = 66,894,692,852.62
  5. Step 5: Solve for x
    x = 66,894,692,852.62/288,791.90
  6. Step 6: Final answer
    x = 231,636.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.