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Finding the Fourth Proportional to 304.90, 457.49 and 189.09

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Solution

The fourth proportional to 304.90, 457.49 and 189.09 is: 283.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.90 : 457.49 = 189.09 : x
  2. Step 2: Convert to fraction form
    304.90/457.49 = 189.09/x
  3. Step 3: Cross multiply
    304.90x = 457.49 × 189.09
  4. Step 4: Simplify right side
    304.90x = 86,507.26
  5. Step 5: Solve for x
    x = 86,507.26/304.90
  6. Step 6: Final answer
    x = 283.73

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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.