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Finding the Fourth Proportional to 281.00, 388.06 and 218.63

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Solution

The fourth proportional to 281.00, 388.06 and 218.63 is: 301.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.00 : 388.06 = 218.63 : x
  2. Step 2: Convert to fraction form
    281.00/388.06 = 218.63/x
  3. Step 3: Cross multiply
    281.00x = 388.06 × 218.63
  4. Step 4: Simplify right side
    281.00x = 84,841.98
  5. Step 5: Solve for x
    x = 84,841.98/281.00
  6. Step 6: Final answer
    x = 301.93

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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.