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Finding the Fourth Proportional to 371.64, 512.40 and 238.63

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Solution

The fourth proportional to 371.64, 512.40 and 238.63 is: 329.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.64 : 512.40 = 238.63 : x
  2. Step 2: Convert to fraction form
    371.64/512.40 = 238.63/x
  3. Step 3: Cross multiply
    371.64x = 512.40 × 238.63
  4. Step 4: Simplify right side
    371.64x = 122,272.13
  5. Step 5: Solve for x
    x = 122,272.13/371.64
  6. Step 6: Final answer
    x = 329.01

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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.