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Finding the Fourth Proportional to 3,556.50, 4,908 and 1,984.92

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Solution

The fourth proportional to 3,556.50, 4,908 and 1,984.92 is: 2,739.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,556.50 : 4,908 = 1,984.92 : x
  2. Step 2: Convert to fraction form
    3,556.50/4,908 = 1,984.92/x
  3. Step 3: Cross multiply
    3,556.50x = 4,908 × 1,984.92
  4. Step 4: Simplify right side
    3,556.50x = 9,741,987.36
  5. Step 5: Solve for x
    x = 9,741,987.36/3,556.50
  6. Step 6: Final answer
    x = 2,739.21

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Double scale
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1.5x scale

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.