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Finding the Fourth Proportional to 220.55, 304.19 and 154.14

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Solution

The fourth proportional to 220.55, 304.19 and 154.14 is: 212.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.55 : 304.19 = 154.14 : x
  2. Step 2: Convert to fraction form
    220.55/304.19 = 154.14/x
  3. Step 3: Cross multiply
    220.55x = 304.19 × 154.14
  4. Step 4: Simplify right side
    220.55x = 46,888.66
  5. Step 5: Solve for x
    x = 46,888.66/220.55
  6. Step 6: Final answer
    x = 212.60

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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.