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Finding the Fourth Proportional to 369.55, 554.32 and 109.55

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Solution

The fourth proportional to 369.55, 554.32 and 109.55 is: 164.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.55 : 554.32 = 109.55 : x
  2. Step 2: Convert to fraction form
    369.55/554.32 = 109.55/x
  3. Step 3: Cross multiply
    369.55x = 554.32 × 109.55
  4. Step 4: Simplify right side
    369.55x = 60,725.76
  5. Step 5: Solve for x
    x = 60,725.76/369.55
  6. Step 6: Final answer
    x = 164.33

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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.