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Finding the Fourth Proportional to 2,991.88, 4,128.06 and 1,749.88

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Solution

The fourth proportional to 2,991.88, 4,128.06 and 1,749.88 is: 2,414.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.88 : 4,128.06 = 1,749.88 : x
  2. Step 2: Convert to fraction form
    2,991.88/4,128.06 = 1,749.88/x
  3. Step 3: Cross multiply
    2,991.88x = 4,128.06 × 1,749.88
  4. Step 4: Simplify right side
    2,991.88x = 7,223,609.63
  5. Step 5: Solve for x
    x = 7,223,609.63/2,991.88
  6. Step 6: Final answer
    x = 2,414.40

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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.