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Finding the Fourth Proportional to 279.88, 386.32 and 206.41

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Solution

The fourth proportional to 279.88, 386.32 and 206.41 is: 284.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.88 : 386.32 = 206.41 : x
  2. Step 2: Convert to fraction form
    279.88/386.32 = 206.41/x
  3. Step 3: Cross multiply
    279.88x = 386.32 × 206.41
  4. Step 4: Simplify right side
    279.88x = 79,737.35
  5. Step 5: Solve for x
    x = 79,737.35/279.88
  6. Step 6: Final answer
    x = 284.90

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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.