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Finding the Fourth Proportional to 328.26, 451.66 and 261.91

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Solution

The fourth proportional to 328.26, 451.66 and 261.91 is: 360.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.26 : 451.66 = 261.91 : x
  2. Step 2: Convert to fraction form
    328.26/451.66 = 261.91/x
  3. Step 3: Cross multiply
    328.26x = 451.66 × 261.91
  4. Step 4: Simplify right side
    328.26x = 118,290.70
  5. Step 5: Solve for x
    x = 118,290.70/328.26
  6. Step 6: Final answer
    x = 360.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.