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Finding the Fourth Proportional to 308.88, 464.28 and 291.60

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Solution

The fourth proportional to 308.88, 464.28 and 291.60 is: 438.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.88 : 464.28 = 291.60 : x
  2. Step 2: Convert to fraction form
    308.88/464.28 = 291.60/x
  3. Step 3: Cross multiply
    308.88x = 464.28 × 291.60
  4. Step 4: Simplify right side
    308.88x = 135,384.05
  5. Step 5: Solve for x
    x = 135,384.05/308.88
  6. Step 6: Final answer
    x = 438.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.