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Finding the Fourth Proportional to 304.08, 419.31 and 279.42

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Solution

The fourth proportional to 304.08, 419.31 and 279.42 is: 385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.08 : 419.31 = 279.42 : x
  2. Step 2: Convert to fraction form
    304.08/419.31 = 279.42/x
  3. Step 3: Cross multiply
    304.08x = 419.31 × 279.42
  4. Step 4: Simplify right side
    304.08x = 117,163.60
  5. Step 5: Solve for x
    x = 117,163.60/304.08
  6. Step 6: Final answer
    x = 385.31

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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.