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Finding the Fourth Proportional to 2,759.70, 4,139.06 and 910.84

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Solution

The fourth proportional to 2,759.70, 4,139.06 and 910.84 is: 1,366.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.70 : 4,139.06 = 910.84 : x
  2. Step 2: Convert to fraction form
    2,759.70/4,139.06 = 910.84/x
  3. Step 3: Cross multiply
    2,759.70x = 4,139.06 × 910.84
  4. Step 4: Simplify right side
    2,759.70x = 3,770,021.41
  5. Step 5: Solve for x
    x = 3,770,021.41/2,759.70
  6. Step 6: Final answer
    x = 1,366.10

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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.