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Finding the Fourth Proportional to 242.22, 364.66 and 213.50

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Solution

The fourth proportional to 242.22, 364.66 and 213.50 is: 321.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.22 : 364.66 = 213.50 : x
  2. Step 2: Convert to fraction form
    242.22/364.66 = 213.50/x
  3. Step 3: Cross multiply
    242.22x = 364.66 × 213.50
  4. Step 4: Simplify right side
    242.22x = 77,853.09
  5. Step 5: Solve for x
    x = 77,853.09/242.22
  6. Step 6: Final answer
    x = 321.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.