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Finding the Fourth Proportional to 494,420.30, 741,630.45 and 139,429.70

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Solution

The fourth proportional to 494,420.30, 741,630.45 and 139,429.70 is: 209,144.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,420.30 : 741,630.45 = 139,429.70 : x
  2. Step 2: Convert to fraction form
    494,420.30/741,630.45 = 139,429.70/x
  3. Step 3: Cross multiply
    494,420.30x = 741,630.45 × 139,429.70
  4. Step 4: Simplify right side
    494,420.30x = 103,405,311,154.37
  5. Step 5: Solve for x
    x = 103,405,311,154.37/494,420.30
  6. Step 6: Final answer
    x = 209,144.55

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Similar ratio
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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.