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Finding the Fourth Proportional to 489,416.40, 733,905.90 and 189,797.40

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Solution

The fourth proportional to 489,416.40, 733,905.90 and 189,797.40 is: 284,611.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,416.40 : 733,905.90 = 189,797.40 : x
  2. Step 2: Convert to fraction form
    489,416.40/733,905.90 = 189,797.40/x
  3. Step 3: Cross multiply
    489,416.40x = 733,905.90 × 189,797.40
  4. Step 4: Simplify right side
    489,416.40x = 139,293,431,664.66
  5. Step 5: Solve for x
    x = 139,293,431,664.66/489,416.40
  6. Step 6: Final answer
    x = 284,611.29

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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.