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Finding the Fourth Proportional to 3,550.88, 4,908 and 3,128

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Solution

The fourth proportional to 3,550.88, 4,908 and 3,128 is: 4,323.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,550.88 : 4,908 = 3,128 : x
  2. Step 2: Convert to fraction form
    3,550.88/4,908 = 3,128/x
  3. Step 3: Cross multiply
    3,550.88x = 4,908 × 3,128
  4. Step 4: Simplify right side
    3,550.88x = 15,352,224
  5. Step 5: Solve for x
    x = 15,352,224/3,550.88
  6. Step 6: Final answer
    x = 4,323.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.