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Finding the Fourth Proportional to 494,426.80, 741,640.20 and 139,436.20

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Solution

The fourth proportional to 494,426.80, 741,640.20 and 139,436.20 is: 209,154.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,426.80 : 741,640.20 = 139,436.20 : x
  2. Step 2: Convert to fraction form
    494,426.80/741,640.20 = 139,436.20/x
  3. Step 3: Cross multiply
    494,426.80x = 741,640.20 × 139,436.20
  4. Step 4: Simplify right side
    494,426.80x = 103,411,491,255.24
  5. Step 5: Solve for x
    x = 103,411,491,255.24/494,426.80
  6. Step 6: Final answer
    x = 209,154.30

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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.