Home / 1,991.36-2,748.24-1,152.36

Finding the Fourth Proportional to 1,991.36, 2,748.24 and 1,152.36

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Solution

The fourth proportional to 1,991.36, 2,748.24 and 1,152.36 is: 1,590.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.36 : 2,748.24 = 1,152.36 : x
  2. Step 2: Convert to fraction form
    1,991.36/2,748.24 = 1,152.36/x
  3. Step 3: Cross multiply
    1,991.36x = 2,748.24 × 1,152.36
  4. Step 4: Simplify right side
    1,991.36x = 3,166,961.85
  5. Step 5: Solve for x
    x = 3,166,961.85/1,991.36
  6. Step 6: Final answer
    x = 1,590.35

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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.