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Finding the Fourth Proportional to 438,512.44, 657,791.87 and 139,016.38

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Solution

The fourth proportional to 438,512.44, 657,791.87 and 139,016.38 is: 208,531.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,512.44 : 657,791.87 = 139,016.38 : x
  2. Step 2: Convert to fraction form
    438,512.44/657,791.87 = 139,016.38/x
  3. Step 3: Cross multiply
    438,512.44x = 657,791.87 × 139,016.38
  4. Step 4: Simplify right side
    438,512.44x = 91,443,844,560.83
  5. Step 5: Solve for x
    x = 91,443,844,560.83/438,512.44
  6. Step 6: Final answer
    x = 208,531.93

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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.