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Finding the Fourth Proportional to 336.92, 505.07 and 154.21

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Solution

The fourth proportional to 336.92, 505.07 and 154.21 is: 231.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.92 : 505.07 = 154.21 : x
  2. Step 2: Convert to fraction form
    336.92/505.07 = 154.21/x
  3. Step 3: Cross multiply
    336.92x = 505.07 × 154.21
  4. Step 4: Simplify right side
    336.92x = 77,884.81
  5. Step 5: Solve for x
    x = 77,884.81/336.92
  6. Step 6: Final answer
    x = 231.17

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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.