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Finding the Fourth Proportional to 220.93, 304.89 and 121.35

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Solution

The fourth proportional to 220.93, 304.89 and 121.35 is: 167.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.93 : 304.89 = 121.35 : x
  2. Step 2: Convert to fraction form
    220.93/304.89 = 121.35/x
  3. Step 3: Cross multiply
    220.93x = 304.89 × 121.35
  4. Step 4: Simplify right side
    220.93x = 36,998.40
  5. Step 5: Solve for x
    x = 36,998.40/220.93
  6. Step 6: Final answer
    x = 167.47

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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.