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Finding the Fourth Proportional to 338.49, 467.21 and 251.01

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Solution

The fourth proportional to 338.49, 467.21 and 251.01 is: 346.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.49 : 467.21 = 251.01 : x
  2. Step 2: Convert to fraction form
    338.49/467.21 = 251.01/x
  3. Step 3: Cross multiply
    338.49x = 467.21 × 251.01
  4. Step 4: Simplify right side
    338.49x = 117,275.01
  5. Step 5: Solve for x
    x = 117,275.01/338.49
  6. Step 6: Final answer
    x = 346.47

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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.