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Finding the Fourth Proportional to 279.07, 385.09 and 168.60

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Solution

The fourth proportional to 279.07, 385.09 and 168.60 is: 232.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.07 : 385.09 = 168.60 : x
  2. Step 2: Convert to fraction form
    279.07/385.09 = 168.60/x
  3. Step 3: Cross multiply
    279.07x = 385.09 × 168.60
  4. Step 4: Simplify right side
    279.07x = 64,926.17
  5. Step 5: Solve for x
    x = 64,926.17/279.07
  6. Step 6: Final answer
    x = 232.65

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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.