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Finding the Fourth Proportional to 494.11, 681.09 and 389.03

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Solution

The fourth proportional to 494.11, 681.09 and 389.03 is: 536.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.11 : 681.09 = 389.03 : x
  2. Step 2: Convert to fraction form
    494.11/681.09 = 389.03/x
  3. Step 3: Cross multiply
    494.11x = 681.09 × 389.03
  4. Step 4: Simplify right side
    494.11x = 264,965.48
  5. Step 5: Solve for x
    x = 264,965.48/494.11
  6. Step 6: Final answer
    x = 536.25

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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.