Home / 2,112.78-2,915.70-1,168.64

Finding the Fourth Proportional to 2,112.78, 2,915.70 and 1,168.64

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Solution

The fourth proportional to 2,112.78, 2,915.70 and 1,168.64 is: 1,612.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.78 : 2,915.70 = 1,168.64 : x
  2. Step 2: Convert to fraction form
    2,112.78/2,915.70 = 1,168.64/x
  3. Step 3: Cross multiply
    2,112.78x = 2,915.70 × 1,168.64
  4. Step 4: Simplify right side
    2,112.78x = 3,407,403.65
  5. Step 5: Solve for x
    x = 3,407,403.65/2,112.78
  6. Step 6: Final answer
    x = 1,612.76

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1.5x scale

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.