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Finding the Fourth Proportional to 401,791.82, 554,436 and 238,420.11

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Solution

The fourth proportional to 401,791.82, 554,436 and 238,420.11 is: 328,997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,791.82 : 554,436 = 238,420.11 : x
  2. Step 2: Convert to fraction form
    401,791.82/554,436 = 238,420.11/x
  3. Step 3: Cross multiply
    401,791.82x = 554,436 × 238,420.11
  4. Step 4: Simplify right side
    401,791.82x = 132,188,692,107.96
  5. Step 5: Solve for x
    x = 132,188,692,107.96/401,791.82
  6. Step 6: Final answer
    x = 328,997.97

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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.