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Finding the Fourth Proportional to 304.36, 455.75 and 212.09

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Solution

The fourth proportional to 304.36, 455.75 and 212.09 is: 317.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.36 : 455.75 = 212.09 : x
  2. Step 2: Convert to fraction form
    304.36/455.75 = 212.09/x
  3. Step 3: Cross multiply
    304.36x = 455.75 × 212.09
  4. Step 4: Simplify right side
    304.36x = 96,661.92
  5. Step 5: Solve for x
    x = 96,661.92/304.36
  6. Step 6: Final answer
    x = 317.59

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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.