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Finding the Fourth Proportional to 735.75, 1,103.81 and 427.06

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Solution

The fourth proportional to 735.75, 1,103.81 and 427.06 is: 640.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.75 : 1,103.81 = 427.06 : x
  2. Step 2: Convert to fraction form
    735.75/1,103.81 = 427.06/x
  3. Step 3: Cross multiply
    735.75x = 1,103.81 × 427.06
  4. Step 4: Simplify right side
    735.75x = 471,388.20
  5. Step 5: Solve for x
    x = 471,388.20/735.75
  6. Step 6: Final answer
    x = 640.69

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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.