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Finding the Fourth Proportional to 222.19, 333.09 and 145.21

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Solution

The fourth proportional to 222.19, 333.09 and 145.21 is: 217.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.19 : 333.09 = 145.21 : x
  2. Step 2: Convert to fraction form
    222.19/333.09 = 145.21/x
  3. Step 3: Cross multiply
    222.19x = 333.09 × 145.21
  4. Step 4: Simplify right side
    222.19x = 48,368.00
  5. Step 5: Solve for x
    x = 48,368.00/222.19
  6. Step 6: Final answer
    x = 217.69

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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.