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Finding the Fourth Proportional to 199.81, 275.70 and 150.67

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Solution

The fourth proportional to 199.81, 275.70 and 150.67 is: 207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.81 : 275.70 = 150.67 : x
  2. Step 2: Convert to fraction form
    199.81/275.70 = 150.67/x
  3. Step 3: Cross multiply
    199.81x = 275.70 × 150.67
  4. Step 4: Simplify right side
    199.81x = 41,539.72
  5. Step 5: Solve for x
    x = 41,539.72/199.81
  6. Step 6: Final answer
    x = 207.90

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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.