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Finding the Fourth Proportional to 239.64, 356.66 and 238.20

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Solution

The fourth proportional to 239.64, 356.66 and 238.20 is: 354.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.64 : 356.66 = 238.20 : x
  2. Step 2: Convert to fraction form
    239.64/356.66 = 238.20/x
  3. Step 3: Cross multiply
    239.64x = 356.66 × 238.20
  4. Step 4: Simplify right side
    239.64x = 84,955.22
  5. Step 5: Solve for x
    x = 84,955.22/239.64
  6. Step 6: Final answer
    x = 354.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.