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Finding the Fourth Proportional to 911.42, 1,369.88 and 604.32

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Solution

The fourth proportional to 911.42, 1,369.88 and 604.32 is: 908.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.42 : 1,369.88 = 604.32 : x
  2. Step 2: Convert to fraction form
    911.42/1,369.88 = 604.32/x
  3. Step 3: Cross multiply
    911.42x = 1,369.88 × 604.32
  4. Step 4: Simplify right side
    911.42x = 827,845.88
  5. Step 5: Solve for x
    x = 827,845.88/911.42
  6. Step 6: Final answer
    x = 908.30

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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.