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Finding the Fourth Proportional to 254.35, 380.85 and 162.55

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Solution

The fourth proportional to 254.35, 380.85 and 162.55 is: 243.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.35 : 380.85 = 162.55 : x
  2. Step 2: Convert to fraction form
    254.35/380.85 = 162.55/x
  3. Step 3: Cross multiply
    254.35x = 380.85 × 162.55
  4. Step 4: Simplify right side
    254.35x = 61,907.17
  5. Step 5: Solve for x
    x = 61,907.17/254.35
  6. Step 6: Final answer
    x = 243.39

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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.