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Finding the Fourth Proportional to 254.08, 380.64 and 172.84

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Solution

The fourth proportional to 254.08, 380.64 and 172.84 is: 258.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.08 : 380.64 = 172.84 : x
  2. Step 2: Convert to fraction form
    254.08/380.64 = 172.84/x
  3. Step 3: Cross multiply
    254.08x = 380.64 × 172.84
  4. Step 4: Simplify right side
    254.08x = 65,789.82
  5. Step 5: Solve for x
    x = 65,789.82/254.08
  6. Step 6: Final answer
    x = 258.93

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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.