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Finding the Fourth Proportional to 279.68, 385.56 and 176

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Solution

The fourth proportional to 279.68, 385.56 and 176 is: 242.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.68 : 385.56 = 176 : x
  2. Step 2: Convert to fraction form
    279.68/385.56 = 176/x
  3. Step 3: Cross multiply
    279.68x = 385.56 × 176
  4. Step 4: Simplify right side
    279.68x = 67,858.56
  5. Step 5: Solve for x
    x = 67,858.56/279.68
  6. Step 6: Final answer
    x = 242.63

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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.