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Finding the Fourth Proportional to 2,855.12, 4,281.33 and 906.80

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Solution

The fourth proportional to 2,855.12, 4,281.33 and 906.80 is: 1,359.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.12 : 4,281.33 = 906.80 : x
  2. Step 2: Convert to fraction form
    2,855.12/4,281.33 = 906.80/x
  3. Step 3: Cross multiply
    2,855.12x = 4,281.33 × 906.80
  4. Step 4: Simplify right side
    2,855.12x = 3,882,310.04
  5. Step 5: Solve for x
    x = 3,882,310.04/2,855.12
  6. Step 6: Final answer
    x = 1,359.77

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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.