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Finding the Fourth Proportional to 293.12, 404.60 and 189.64

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Solution

The fourth proportional to 293.12, 404.60 and 189.64 is: 261.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.12 : 404.60 = 189.64 : x
  2. Step 2: Convert to fraction form
    293.12/404.60 = 189.64/x
  3. Step 3: Cross multiply
    293.12x = 404.60 × 189.64
  4. Step 4: Simplify right side
    293.12x = 76,728.34
  5. Step 5: Solve for x
    x = 76,728.34/293.12
  6. Step 6: Final answer
    x = 261.76

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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.