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Finding the Fourth Proportional to 369.03, 509.39 and 221.74

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Solution

The fourth proportional to 369.03, 509.39 and 221.74 is: 306.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.03 : 509.39 = 221.74 : x
  2. Step 2: Convert to fraction form
    369.03/509.39 = 221.74/x
  3. Step 3: Cross multiply
    369.03x = 509.39 × 221.74
  4. Step 4: Simplify right side
    369.03x = 112,952.14
  5. Step 5: Solve for x
    x = 112,952.14/369.03
  6. Step 6: Final answer
    x = 306.08

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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.