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Finding the Fourth Proportional to 266.89, 399.88 and 208.44

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Solution

The fourth proportional to 266.89, 399.88 and 208.44 is: 312.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.89 : 399.88 = 208.44 : x
  2. Step 2: Convert to fraction form
    266.89/399.88 = 208.44/x
  3. Step 3: Cross multiply
    266.89x = 399.88 × 208.44
  4. Step 4: Simplify right side
    266.89x = 83,349.95
  5. Step 5: Solve for x
    x = 83,349.95/266.89
  6. Step 6: Final answer
    x = 312.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.