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Finding the Fourth Proportional to 489,920.06, 734,691.11 and 190,361.20

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Solution

The fourth proportional to 489,920.06, 734,691.11 and 190,361.20 is: 285,468.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,920.06 : 734,691.11 = 190,361.20 : x
  2. Step 2: Convert to fraction form
    489,920.06/734,691.11 = 190,361.20/x
  3. Step 3: Cross multiply
    489,920.06x = 734,691.11 × 190,361.20
  4. Step 4: Simplify right side
    489,920.06x = 139,856,677,655.48
  5. Step 5: Solve for x
    x = 139,856,677,655.48/489,920.06
  6. Step 6: Final answer
    x = 285,468.37

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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.