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Finding the Fourth Proportional to 911.42, 1,367.36 and 262.16

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Solution

The fourth proportional to 911.42, 1,367.36 and 262.16 is: 393.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.42 : 1,367.36 = 262.16 : x
  2. Step 2: Convert to fraction form
    911.42/1,367.36 = 262.16/x
  3. Step 3: Cross multiply
    911.42x = 1,367.36 × 262.16
  4. Step 4: Simplify right side
    911.42x = 358,467.10
  5. Step 5: Solve for x
    x = 358,467.10/911.42
  6. Step 6: Final answer
    x = 393.31

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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.