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Finding the Fourth Proportional to 254.07, 381.31 and 117.05

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Solution

The fourth proportional to 254.07, 381.31 and 117.05 is: 175.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.07 : 381.31 = 117.05 : x
  2. Step 2: Convert to fraction form
    254.07/381.31 = 117.05/x
  3. Step 3: Cross multiply
    254.07x = 381.31 × 117.05
  4. Step 4: Simplify right side
    254.07x = 44,630.14
  5. Step 5: Solve for x
    x = 44,630.14/254.07
  6. Step 6: Final answer
    x = 175.66

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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.