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Finding the Fourth Proportional to 154.49, 212.55 and 141.44

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Solution

The fourth proportional to 154.49, 212.55 and 141.44 is: 194.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.49 : 212.55 = 141.44 : x
  2. Step 2: Convert to fraction form
    154.49/212.55 = 141.44/x
  3. Step 3: Cross multiply
    154.49x = 212.55 × 141.44
  4. Step 4: Simplify right side
    154.49x = 30,062.01
  5. Step 5: Solve for x
    x = 30,062.01/154.49
  6. Step 6: Final answer
    x = 194.60

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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.