Home / 1,914.24-2,640.96-1,728

Finding the Fourth Proportional to 1,914.24, 2,640.96 and 1,728

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Solution

The fourth proportional to 1,914.24, 2,640.96 and 1,728 is: 2,384.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.24 : 2,640.96 = 1,728 : x
  2. Step 2: Convert to fraction form
    1,914.24/2,640.96 = 1,728/x
  3. Step 3: Cross multiply
    1,914.24x = 2,640.96 × 1,728
  4. Step 4: Simplify right side
    1,914.24x = 4,563,578.88
  5. Step 5: Solve for x
    x = 4,563,578.88/1,914.24
  6. Step 6: Final answer
    x = 2,384.02

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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.