Home / 2,955.30-4,431.42-1,915.80

Finding the Fourth Proportional to 2,955.30, 4,431.42 and 1,915.80

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Solution

The fourth proportional to 2,955.30, 4,431.42 and 1,915.80 is: 2,872.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,955.30 : 4,431.42 = 1,915.80 : x
  2. Step 2: Convert to fraction form
    2,955.30/4,431.42 = 1,915.80/x
  3. Step 3: Cross multiply
    2,955.30x = 4,431.42 × 1,915.80
  4. Step 4: Simplify right side
    2,955.30x = 8,489,714.44
  5. Step 5: Solve for x
    x = 8,489,714.44/2,955.30
  6. Step 6: Final answer
    x = 2,872.71

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1.5x scale

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.