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Finding the Fourth Proportional to 273,338.40, 409,861.80 and 115,388.40

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Solution

The fourth proportional to 273,338.40, 409,861.80 and 115,388.40 is: 173,021.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,338.40 : 409,861.80 = 115,388.40 : x
  2. Step 2: Convert to fraction form
    273,338.40/409,861.80 = 115,388.40/x
  3. Step 3: Cross multiply
    273,338.40x = 409,861.80 × 115,388.40
  4. Step 4: Simplify right side
    273,338.40x = 47,293,297,323.12
  5. Step 5: Solve for x
    x = 47,293,297,323.12/273,338.40
  6. Step 6: Final answer
    x = 173,021.05

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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.