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Finding the Fourth Proportional to 494,856.70, 742,212.15 and 139,906.60

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Solution

The fourth proportional to 494,856.70, 742,212.15 and 139,906.60 is: 209,839.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,856.70 : 742,212.15 = 139,906.60 : x
  2. Step 2: Convert to fraction form
    494,856.70/742,212.15 = 139,906.60/x
  3. Step 3: Cross multiply
    494,856.70x = 742,212.15 × 139,906.60
  4. Step 4: Simplify right side
    494,856.70x = 103,840,378,385.19
  5. Step 5: Solve for x
    x = 103,840,378,385.19/494,856.70
  6. Step 6: Final answer
    x = 209,839.29

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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.