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Finding the Fourth Proportional to 272.07, 407.31 and 238.23

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Solution

The fourth proportional to 272.07, 407.31 and 238.23 is: 356.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.07 : 407.31 = 238.23 : x
  2. Step 2: Convert to fraction form
    272.07/407.31 = 238.23/x
  3. Step 3: Cross multiply
    272.07x = 407.31 × 238.23
  4. Step 4: Simplify right side
    272.07x = 97,033.46
  5. Step 5: Solve for x
    x = 97,033.46/272.07
  6. Step 6: Final answer
    x = 356.65

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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.