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Finding the Fourth Proportional to 336.91, 505.39 and 215.41

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Solution

The fourth proportional to 336.91, 505.39 and 215.41 is: 323.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.91 : 505.39 = 215.41 : x
  2. Step 2: Convert to fraction form
    336.91/505.39 = 215.41/x
  3. Step 3: Cross multiply
    336.91x = 505.39 × 215.41
  4. Step 4: Simplify right side
    336.91x = 108,866.06
  5. Step 5: Solve for x
    x = 108,866.06/336.91
  6. Step 6: Final answer
    x = 323.13

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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.