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Finding the Fourth Proportional to 369.21, 554.82 and 355.54

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Solution

The fourth proportional to 369.21, 554.82 and 355.54 is: 534.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.21 : 554.82 = 355.54 : x
  2. Step 2: Convert to fraction form
    369.21/554.82 = 355.54/x
  3. Step 3: Cross multiply
    369.21x = 554.82 × 355.54
  4. Step 4: Simplify right side
    369.21x = 197,262.02
  5. Step 5: Solve for x
    x = 197,262.02/369.21
  6. Step 6: Final answer
    x = 534.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.