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Finding the Fourth Proportional to 735.11, 1,103.81 and 620.45

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Solution

The fourth proportional to 735.11, 1,103.81 and 620.45 is: 931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.11 : 1,103.81 = 620.45 : x
  2. Step 2: Convert to fraction form
    735.11/1,103.81 = 620.45/x
  3. Step 3: Cross multiply
    735.11x = 1,103.81 × 620.45
  4. Step 4: Simplify right side
    735.11x = 684,850.29
  5. Step 5: Solve for x
    x = 684,850.29/735.11
  6. Step 6: Final answer
    x = 931.64

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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.