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Finding the Fourth Proportional to 294.26, 405.86 and 281.81

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Solution

The fourth proportional to 294.26, 405.86 and 281.81 is: 388.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.26 : 405.86 = 281.81 : x
  2. Step 2: Convert to fraction form
    294.26/405.86 = 281.81/x
  3. Step 3: Cross multiply
    294.26x = 405.86 × 281.81
  4. Step 4: Simplify right side
    294.26x = 114,371.97
  5. Step 5: Solve for x
    x = 114,371.97/294.26
  6. Step 6: Final answer
    x = 388.68

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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.