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Finding the Fourth Proportional to 2,739.92, 4,109.10 and 984.64

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Solution

The fourth proportional to 2,739.92, 4,109.10 and 984.64 is: 1,476.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.92 : 4,109.10 = 984.64 : x
  2. Step 2: Convert to fraction form
    2,739.92/4,109.10 = 984.64/x
  3. Step 3: Cross multiply
    2,739.92x = 4,109.10 × 984.64
  4. Step 4: Simplify right side
    2,739.92x = 4,045,984.22
  5. Step 5: Solve for x
    x = 4,045,984.22/2,739.92
  6. Step 6: Final answer
    x = 1,476.68

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1.5x scale

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.