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Finding the Fourth Proportional to 288.43, 398.06 and 164.13

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Solution

The fourth proportional to 288.43, 398.06 and 164.13 is: 226.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.43 : 398.06 = 164.13 : x
  2. Step 2: Convert to fraction form
    288.43/398.06 = 164.13/x
  3. Step 3: Cross multiply
    288.43x = 398.06 × 164.13
  4. Step 4: Simplify right side
    288.43x = 65,333.38
  5. Step 5: Solve for x
    x = 65,333.38/288.43
  6. Step 6: Final answer
    x = 226.51

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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.