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Finding the Fourth Proportional to 254.81, 381.95 and 177.80

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Solution

The fourth proportional to 254.81, 381.95 and 177.80 is: 266.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.81 : 381.95 = 177.80 : x
  2. Step 2: Convert to fraction form
    254.81/381.95 = 177.80/x
  3. Step 3: Cross multiply
    254.81x = 381.95 × 177.80
  4. Step 4: Simplify right side
    254.81x = 67,908.58
  5. Step 5: Solve for x
    x = 67,908.58/254.81
  6. Step 6: Final answer
    x = 266.50

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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.