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Finding the Fourth Proportional to 279.83, 385.58 and 197.03

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Solution

The fourth proportional to 279.83, 385.58 and 197.03 is: 271.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.83 : 385.58 = 197.03 : x
  2. Step 2: Convert to fraction form
    279.83/385.58 = 197.03/x
  3. Step 3: Cross multiply
    279.83x = 385.58 × 197.03
  4. Step 4: Simplify right side
    279.83x = 75,967.91
  5. Step 5: Solve for x
    x = 75,967.91/279.83
  6. Step 6: Final answer
    x = 271.48

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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.