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Finding the Fourth Proportional to 202.69, 304.04 and 121.60

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Solution

The fourth proportional to 202.69, 304.04 and 121.60 is: 182.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.69 : 304.04 = 121.60 : x
  2. Step 2: Convert to fraction form
    202.69/304.04 = 121.60/x
  3. Step 3: Cross multiply
    202.69x = 304.04 × 121.60
  4. Step 4: Simplify right side
    202.69x = 36,971.26
  5. Step 5: Solve for x
    x = 36,971.26/202.69
  6. Step 6: Final answer
    x = 182.40

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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.