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Finding the Fourth Proportional to 2,629.61, 3,944.65 and 755.51

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Solution

The fourth proportional to 2,629.61, 3,944.65 and 755.51 is: 1,133.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.61 : 3,944.65 = 755.51 : x
  2. Step 2: Convert to fraction form
    2,629.61/3,944.65 = 755.51/x
  3. Step 3: Cross multiply
    2,629.61x = 3,944.65 × 755.51
  4. Step 4: Simplify right side
    2,629.61x = 2,980,222.52
  5. Step 5: Solve for x
    x = 2,980,222.52/2,629.61
  6. Step 6: Final answer
    x = 1,133.33

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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.