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Finding the Fourth Proportional to 304.25, 455.69 and 213.36

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Solution

The fourth proportional to 304.25, 455.69 and 213.36 is: 319.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.25 : 455.69 = 213.36 : x
  2. Step 2: Convert to fraction form
    304.25/455.69 = 213.36/x
  3. Step 3: Cross multiply
    304.25x = 455.69 × 213.36
  4. Step 4: Simplify right side
    304.25x = 97,224.84
  5. Step 5: Solve for x
    x = 97,224.84/304.25
  6. Step 6: Final answer
    x = 319.55

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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.