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Finding the Fourth Proportional to 2,803.71, 4,206.33 and 855.87

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Solution

The fourth proportional to 2,803.71, 4,206.33 and 855.87 is: 1,284.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,803.71 : 4,206.33 = 855.87 : x
  2. Step 2: Convert to fraction form
    2,803.71/4,206.33 = 855.87/x
  3. Step 3: Cross multiply
    2,803.71x = 4,206.33 × 855.87
  4. Step 4: Simplify right side
    2,803.71x = 3,600,055.88
  5. Step 5: Solve for x
    x = 3,600,055.88/2,803.71
  6. Step 6: Final answer
    x = 1,284.03

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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.