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Finding the Fourth Proportional to 494,322.66, 682,138.76 and 279,449.91

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Solution

The fourth proportional to 494,322.66, 682,138.76 and 279,449.91 is: 385,625.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,322.66 : 682,138.76 = 279,449.91 : x
  2. Step 2: Convert to fraction form
    494,322.66/682,138.76 = 279,449.91/x
  3. Step 3: Cross multiply
    494,322.66x = 682,138.76 × 279,449.91
  4. Step 4: Simplify right side
    494,322.66x = 190,623,613,692.26
  5. Step 5: Solve for x
    x = 190,623,613,692.26/494,322.66
  6. Step 6: Final answer
    x = 385,625.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.