Home / 2,629.78-3,943.23-1,148.40

Finding the Fourth Proportional to 2,629.78, 3,943.23 and 1,148.40

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Solution

The fourth proportional to 2,629.78, 3,943.23 and 1,148.40 is: 1,721.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.78 : 3,943.23 = 1,148.40 : x
  2. Step 2: Convert to fraction form
    2,629.78/3,943.23 = 1,148.40/x
  3. Step 3: Cross multiply
    2,629.78x = 3,943.23 × 1,148.40
  4. Step 4: Simplify right side
    2,629.78x = 4,528,405.33
  5. Step 5: Solve for x
    x = 4,528,405.33/2,629.78
  6. Step 6: Final answer
    x = 1,721.97

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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.