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Finding the Fourth Proportional to 489,880.19, 734,866.75 and 190,383.90

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Solution

The fourth proportional to 489,880.19, 734,866.75 and 190,383.90 is: 285,593.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,880.19 : 734,866.75 = 190,383.90 : x
  2. Step 2: Convert to fraction form
    489,880.19/734,866.75 = 190,383.90/x
  3. Step 3: Cross multiply
    489,880.19x = 734,866.75 × 190,383.90
  4. Step 4: Simplify right side
    489,880.19x = 139,906,797,845.33
  5. Step 5: Solve for x
    x = 139,906,797,845.33/489,880.19
  6. Step 6: Final answer
    x = 285,593.91

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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.