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Finding the Fourth Proportional to 2,803.55, 4,204.71 and 855.77

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Solution

The fourth proportional to 2,803.55, 4,204.71 and 855.77 is: 1,283.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,803.55 : 4,204.71 = 855.77 : x
  2. Step 2: Convert to fraction form
    2,803.55/4,204.71 = 855.77/x
  3. Step 3: Cross multiply
    2,803.55x = 4,204.71 × 855.77
  4. Step 4: Simplify right side
    2,803.55x = 3,598,243.65
  5. Step 5: Solve for x
    x = 3,598,243.65/2,803.55
  6. Step 6: Final answer
    x = 1,283.46

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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.