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Finding the Fourth Proportional to 735.90, 1,100.97 and 620.61

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Solution

The fourth proportional to 735.90, 1,100.97 and 620.61 is: 928.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.90 : 1,100.97 = 620.61 : x
  2. Step 2: Convert to fraction form
    735.90/1,100.97 = 620.61/x
  3. Step 3: Cross multiply
    735.90x = 1,100.97 × 620.61
  4. Step 4: Simplify right side
    735.90x = 683,272.99
  5. Step 5: Solve for x
    x = 683,272.99/735.90
  6. Step 6: Final answer
    x = 928.49

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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.