Home / 1,913.62-2,640.99-1,127.92

Finding the Fourth Proportional to 1,913.62, 2,640.99 and 1,127.92

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Solution

The fourth proportional to 1,913.62, 2,640.99 and 1,127.92 is: 1,556.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.62 : 2,640.99 = 1,127.92 : x
  2. Step 2: Convert to fraction form
    1,913.62/2,640.99 = 1,127.92/x
  3. Step 3: Cross multiply
    1,913.62x = 2,640.99 × 1,127.92
  4. Step 4: Simplify right side
    1,913.62x = 2,978,825.44
  5. Step 5: Solve for x
    x = 2,978,825.44/1,913.62
  6. Step 6: Final answer
    x = 1,556.64

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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.