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Finding the Fourth Proportional to 281.77, 388.75 and 171.06

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Solution

The fourth proportional to 281.77, 388.75 and 171.06 is: 236.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.77 : 388.75 = 171.06 : x
  2. Step 2: Convert to fraction form
    281.77/388.75 = 171.06/x
  3. Step 3: Cross multiply
    281.77x = 388.75 × 171.06
  4. Step 4: Simplify right side
    281.77x = 66,496.78
  5. Step 5: Solve for x
    x = 66,496.78/281.77
  6. Step 6: Final answer
    x = 236.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.