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Finding the Fourth Proportional to 199.31, 275.04 and 111.98

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Solution

The fourth proportional to 199.31, 275.04 and 111.98 is: 154.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.31 : 275.04 = 111.98 : x
  2. Step 2: Convert to fraction form
    199.31/275.04 = 111.98/x
  3. Step 3: Cross multiply
    199.31x = 275.04 × 111.98
  4. Step 4: Simplify right side
    199.31x = 30,798.98
  5. Step 5: Solve for x
    x = 30,798.98/199.31
  6. Step 6: Final answer
    x = 154.53

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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.