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Finding the Fourth Proportional to 312.28, 467.43 and 254.01

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Solution

The fourth proportional to 312.28, 467.43 and 254.01 is: 380.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.28 : 467.43 = 254.01 : x
  2. Step 2: Convert to fraction form
    312.28/467.43 = 254.01/x
  3. Step 3: Cross multiply
    312.28x = 467.43 × 254.01
  4. Step 4: Simplify right side
    312.28x = 118,731.89
  5. Step 5: Solve for x
    x = 118,731.89/312.28
  6. Step 6: Final answer
    x = 380.21

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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.