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Finding the Fourth Proportional to 369.41, 509.62 and 221.95

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Solution

The fourth proportional to 369.41, 509.62 and 221.95 is: 306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.41 : 509.62 = 221.95 : x
  2. Step 2: Convert to fraction form
    369.41/509.62 = 221.95/x
  3. Step 3: Cross multiply
    369.41x = 509.62 × 221.95
  4. Step 4: Simplify right side
    369.41x = 113,111.52
  5. Step 5: Solve for x
    x = 113,111.52/369.41
  6. Step 6: Final answer
    x = 306.20

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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.