Home / 1,913.75-2,641.41-1,128.05

Finding the Fourth Proportional to 1,913.75, 2,641.41 and 1,128.05

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Solution

The fourth proportional to 1,913.75, 2,641.41 and 1,128.05 is: 1,556.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.75 : 2,641.41 = 1,128.05 : x
  2. Step 2: Convert to fraction form
    1,913.75/2,641.41 = 1,128.05/x
  3. Step 3: Cross multiply
    1,913.75x = 2,641.41 × 1,128.05
  4. Step 4: Simplify right side
    1,913.75x = 2,979,642.55
  5. Step 5: Solve for x
    x = 2,979,642.55/1,913.75
  6. Step 6: Final answer
    x = 1,556.97

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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.