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Finding the Fourth Proportional to 2,855.15, 4,282.37 and 775.02

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Solution

The fourth proportional to 2,855.15, 4,282.37 and 775.02 is: 1,162.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.15 : 4,282.37 = 775.02 : x
  2. Step 2: Convert to fraction form
    2,855.15/4,282.37 = 775.02/x
  3. Step 3: Cross multiply
    2,855.15x = 4,282.37 × 775.02
  4. Step 4: Simplify right side
    2,855.15x = 3,318,922.40
  5. Step 5: Solve for x
    x = 3,318,922.40/2,855.15
  6. Step 6: Final answer
    x = 1,162.43

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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.