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Finding the Fourth Proportional to 369.22, 509.39 and 211.87

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Solution

The fourth proportional to 369.22, 509.39 and 211.87 is: 292.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.22 : 509.39 = 211.87 : x
  2. Step 2: Convert to fraction form
    369.22/509.39 = 211.87/x
  3. Step 3: Cross multiply
    369.22x = 509.39 × 211.87
  4. Step 4: Simplify right side
    369.22x = 107,922.44
  5. Step 5: Solve for x
    x = 107,922.44/369.22
  6. Step 6: Final answer
    x = 292.30

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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.