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Finding the Fourth Proportional to 494,196.80, 741,640.80 and 213,915.20

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Solution

The fourth proportional to 494,196.80, 741,640.80 and 213,915.20 is: 321,022.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,196.80 : 741,640.80 = 213,915.20 : x
  2. Step 2: Convert to fraction form
    494,196.80/741,640.80 = 213,915.20/x
  3. Step 3: Cross multiply
    494,196.80x = 741,640.80 × 213,915.20
  4. Step 4: Simplify right side
    494,196.80x = 158,648,240,060.16
  5. Step 5: Solve for x
    x = 158,648,240,060.16/494,196.80
  6. Step 6: Final answer
    x = 321,022.39

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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.