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Finding the Fourth Proportional to 279.02, 385.07 and 208.95

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Solution

The fourth proportional to 279.02, 385.07 and 208.95 is: 288.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.02 : 385.07 = 208.95 : x
  2. Step 2: Convert to fraction form
    279.02/385.07 = 208.95/x
  3. Step 3: Cross multiply
    279.02x = 385.07 × 208.95
  4. Step 4: Simplify right side
    279.02x = 80,459.33
  5. Step 5: Solve for x
    x = 80,459.33/279.02
  6. Step 6: Final answer
    x = 288.37

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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.