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Finding the Fourth Proportional to 494.21, 741.69 and 186.34

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Solution

The fourth proportional to 494.21, 741.69 and 186.34 is: 279.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.21 : 741.69 = 186.34 : x
  2. Step 2: Convert to fraction form
    494.21/741.69 = 186.34/x
  3. Step 3: Cross multiply
    494.21x = 741.69 × 186.34
  4. Step 4: Simplify right side
    494.21x = 138,204.66
  5. Step 5: Solve for x
    x = 138,204.66/494.21
  6. Step 6: Final answer
    x = 279.65

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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.