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Finding the Fourth Proportional to 2,803.58, 4,205.21 and 855.63

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Solution

The fourth proportional to 2,803.58, 4,205.21 and 855.63 is: 1,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,803.58 : 4,205.21 = 855.63 : x
  2. Step 2: Convert to fraction form
    2,803.58/4,205.21 = 855.63/x
  3. Step 3: Cross multiply
    2,803.58x = 4,205.21 × 855.63
  4. Step 4: Simplify right side
    2,803.58x = 3,598,103.83
  5. Step 5: Solve for x
    x = 3,598,103.83/2,803.58
  6. Step 6: Final answer
    x = 1,283.40

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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.