Home / 2,915.36-4,022.48-1,984.80

Finding the Fourth Proportional to 2,915.36, 4,022.48 and 1,984.80

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Solution

The fourth proportional to 2,915.36, 4,022.48 and 1,984.80 is: 2,738.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.36 : 4,022.48 = 1,984.80 : x
  2. Step 2: Convert to fraction form
    2,915.36/4,022.48 = 1,984.80/x
  3. Step 3: Cross multiply
    2,915.36x = 4,022.48 × 1,984.80
  4. Step 4: Simplify right side
    2,915.36x = 7,983,818.30
  5. Step 5: Solve for x
    x = 7,983,818.30/2,915.36
  6. Step 6: Final answer
    x = 2,738.54

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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.