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Finding the Fourth Proportional to 289.09, 398.95 and 164.75

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Solution

The fourth proportional to 289.09, 398.95 and 164.75 is: 227.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.09 : 398.95 = 164.75 : x
  2. Step 2: Convert to fraction form
    289.09/398.95 = 164.75/x
  3. Step 3: Cross multiply
    289.09x = 398.95 × 164.75
  4. Step 4: Simplify right side
    289.09x = 65,727.60
  5. Step 5: Solve for x
    x = 65,727.60/289.09
  6. Step 6: Final answer
    x = 227.36

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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.