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Finding the Fourth Proportional to 242.16, 333.72 and 164.40

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Solution

The fourth proportional to 242.16, 333.72 and 164.40 is: 226.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.16 : 333.72 = 164.40 : x
  2. Step 2: Convert to fraction form
    242.16/333.72 = 164.40/x
  3. Step 3: Cross multiply
    242.16x = 333.72 × 164.40
  4. Step 4: Simplify right side
    242.16x = 54,863.57
  5. Step 5: Solve for x
    x = 54,863.57/242.16
  6. Step 6: Final answer
    x = 226.56

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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.