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Finding the Fourth Proportional to 735.69, 1,103.48 and 427.35

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Solution

The fourth proportional to 735.69, 1,103.48 and 427.35 is: 640.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.69 : 1,103.48 = 427.35 : x
  2. Step 2: Convert to fraction form
    735.69/1,103.48 = 427.35/x
  3. Step 3: Cross multiply
    735.69x = 1,103.48 × 427.35
  4. Step 4: Simplify right side
    735.69x = 471,564.52
  5. Step 5: Solve for x
    x = 471,564.52/735.69
  6. Step 6: Final answer
    x = 640.99

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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.