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Finding the Fourth Proportional to 438,791.31, 658,211.40 and 123,223.50

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Solution

The fourth proportional to 438,791.31, 658,211.40 and 123,223.50 is: 184,842.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,791.31 : 658,211.40 = 123,223.50 : x
  2. Step 2: Convert to fraction form
    438,791.31/658,211.40 = 123,223.50/x
  3. Step 3: Cross multiply
    438,791.31x = 658,211.40 × 123,223.50
  4. Step 4: Simplify right side
    438,791.31x = 81,107,112,447.90
  5. Step 5: Solve for x
    x = 81,107,112,447.90/438,791.31
  6. Step 6: Final answer
    x = 184,842.11

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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.