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Finding the Fourth Proportional to 298.40, 448.29 and 211.95

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Solution

The fourth proportional to 298.40, 448.29 and 211.95 is: 318.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.40 : 448.29 = 211.95 : x
  2. Step 2: Convert to fraction form
    298.40/448.29 = 211.95/x
  3. Step 3: Cross multiply
    298.40x = 448.29 × 211.95
  4. Step 4: Simplify right side
    298.40x = 95,015.07
  5. Step 5: Solve for x
    x = 95,015.07/298.40
  6. Step 6: Final answer
    x = 318.42

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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.