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Finding the Fourth Proportional to 222.45, 334.35 and 218.40

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Solution

The fourth proportional to 222.45, 334.35 and 218.40 is: 328.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.45 : 334.35 = 218.40 : x
  2. Step 2: Convert to fraction form
    222.45/334.35 = 218.40/x
  3. Step 3: Cross multiply
    222.45x = 334.35 × 218.40
  4. Step 4: Simplify right side
    222.45x = 73,022.04
  5. Step 5: Solve for x
    x = 73,022.04/222.45
  6. Step 6: Final answer
    x = 328.26

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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.