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Finding the Fourth Proportional to 254.90, 381.54 and 181.74

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Solution

The fourth proportional to 254.90, 381.54 and 181.74 is: 272.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.90 : 381.54 = 181.74 : x
  2. Step 2: Convert to fraction form
    254.90/381.54 = 181.74/x
  3. Step 3: Cross multiply
    254.90x = 381.54 × 181.74
  4. Step 4: Simplify right side
    254.90x = 69,341.08
  5. Step 5: Solve for x
    x = 69,341.08/254.90
  6. Step 6: Final answer
    x = 272.03

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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.