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Finding the Fourth Proportional to 2,759.36, 4,138.65 and 910.26

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Solution

The fourth proportional to 2,759.36, 4,138.65 and 910.26 is: 1,365.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.36 : 4,138.65 = 910.26 : x
  2. Step 2: Convert to fraction form
    2,759.36/4,138.65 = 910.26/x
  3. Step 3: Cross multiply
    2,759.36x = 4,138.65 × 910.26
  4. Step 4: Simplify right side
    2,759.36x = 3,767,247.55
  5. Step 5: Solve for x
    x = 3,767,247.55/2,759.36
  6. Step 6: Final answer
    x = 1,365.26

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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.