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Finding the Fourth Proportional to 736.44, 1,105.08 and 389.94

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Solution

The fourth proportional to 736.44, 1,105.08 and 389.94 is: 585.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.44 : 1,105.08 = 389.94 : x
  2. Step 2: Convert to fraction form
    736.44/1,105.08 = 389.94/x
  3. Step 3: Cross multiply
    736.44x = 1,105.08 × 389.94
  4. Step 4: Simplify right side
    736.44x = 430,914.90
  5. Step 5: Solve for x
    x = 430,914.90/736.44
  6. Step 6: Final answer
    x = 585.13

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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.