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Finding the Fourth Proportional to 304.30, 455.37 and 206.81

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Solution

The fourth proportional to 304.30, 455.37 and 206.81 is: 309.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.30 : 455.37 = 206.81 : x
  2. Step 2: Convert to fraction form
    304.30/455.37 = 206.81/x
  3. Step 3: Cross multiply
    304.30x = 455.37 × 206.81
  4. Step 4: Simplify right side
    304.30x = 94,175.07
  5. Step 5: Solve for x
    x = 94,175.07/304.30
  6. Step 6: Final answer
    x = 309.48

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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.