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Finding the Fourth Proportional to 311.19, 465.65 and 300.26

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Solution

The fourth proportional to 311.19, 465.65 and 300.26 is: 449.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.19 : 465.65 = 300.26 : x
  2. Step 2: Convert to fraction form
    311.19/465.65 = 300.26/x
  3. Step 3: Cross multiply
    311.19x = 465.65 × 300.26
  4. Step 4: Simplify right side
    311.19x = 139,814.24
  5. Step 5: Solve for x
    x = 139,814.24/311.19
  6. Step 6: Final answer
    x = 449.29

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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.