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Finding the Fourth Proportional to 239.22, 328.37 and 220.76

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Solution

The fourth proportional to 239.22, 328.37 and 220.76 is: 303.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.22 : 328.37 = 220.76 : x
  2. Step 2: Convert to fraction form
    239.22/328.37 = 220.76/x
  3. Step 3: Cross multiply
    239.22x = 328.37 × 220.76
  4. Step 4: Simplify right side
    239.22x = 72,488.22
  5. Step 5: Solve for x
    x = 72,488.22/239.22
  6. Step 6: Final answer
    x = 303.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.