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Finding the Fourth Proportional to 735.21, 1,103.63 and 621.07

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Solution

The fourth proportional to 735.21, 1,103.63 and 621.07 is: 932.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.21 : 1,103.63 = 621.07 : x
  2. Step 2: Convert to fraction form
    735.21/1,103.63 = 621.07/x
  3. Step 3: Cross multiply
    735.21x = 1,103.63 × 621.07
  4. Step 4: Simplify right side
    735.21x = 685,425.62
  5. Step 5: Solve for x
    x = 685,425.62/735.21
  6. Step 6: Final answer
    x = 932.29

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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.