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Finding the Fourth Proportional to 279.98, 386.57 and 214.37

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Solution

The fourth proportional to 279.98, 386.57 and 214.37 is: 295.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.98 : 386.57 = 214.37 : x
  2. Step 2: Convert to fraction form
    279.98/386.57 = 214.37/x
  3. Step 3: Cross multiply
    279.98x = 386.57 × 214.37
  4. Step 4: Simplify right side
    279.98x = 82,867.94
  5. Step 5: Solve for x
    x = 82,867.94/279.98
  6. Step 6: Final answer
    x = 295.98

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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.