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Finding the Fourth Proportional to 737.10, 1,104.20 and 428.18

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Solution

The fourth proportional to 737.10, 1,104.20 and 428.18 is: 641.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.10 : 1,104.20 = 428.18 : x
  2. Step 2: Convert to fraction form
    737.10/1,104.20 = 428.18/x
  3. Step 3: Cross multiply
    737.10x = 1,104.20 × 428.18
  4. Step 4: Simplify right side
    737.10x = 472,796.36
  5. Step 5: Solve for x
    x = 472,796.36/737.10
  6. Step 6: Final answer
    x = 641.43

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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.