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Finding the Fourth Proportional to 338.10, 506.34 and 215.99

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Solution

The fourth proportional to 338.10, 506.34 and 215.99 is: 323.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.10 : 506.34 = 215.99 : x
  2. Step 2: Convert to fraction form
    338.10/506.34 = 215.99/x
  3. Step 3: Cross multiply
    338.10x = 506.34 × 215.99
  4. Step 4: Simplify right side
    338.10x = 109,361.84
  5. Step 5: Solve for x
    x = 109,361.84/338.10
  6. Step 6: Final answer
    x = 323.46

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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.