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Finding the Fourth Proportional to 308.21, 464.36 and 278.96

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Solution

The fourth proportional to 308.21, 464.36 and 278.96 is: 420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.21 : 464.36 = 278.96 : x
  2. Step 2: Convert to fraction form
    308.21/464.36 = 278.96/x
  3. Step 3: Cross multiply
    308.21x = 464.36 × 278.96
  4. Step 4: Simplify right side
    308.21x = 129,537.11
  5. Step 5: Solve for x
    x = 129,537.11/308.21
  6. Step 6: Final answer
    x = 420.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.