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Finding the Fourth Proportional to 438,991.44, 658,418.31 and 139,432.52

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Solution

The fourth proportional to 438,991.44, 658,418.31 and 139,432.52 is: 209,126.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,991.44 : 658,418.31 = 139,432.52 : x
  2. Step 2: Convert to fraction form
    438,991.44/658,418.31 = 139,432.52/x
  3. Step 3: Cross multiply
    438,991.44x = 658,418.31 × 139,432.52
  4. Step 4: Simplify right side
    438,991.44x = 91,804,920,885.35
  5. Step 5: Solve for x
    x = 91,804,920,885.35/438,991.44
  6. Step 6: Final answer
    x = 209,126.90

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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.