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Finding the Fourth Proportional to 3,813.04, 5,720.32 and 1,865.28

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Solution

The fourth proportional to 3,813.04, 5,720.32 and 1,865.28 is: 2,798.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,813.04 : 5,720.32 = 1,865.28 : x
  2. Step 2: Convert to fraction form
    3,813.04/5,720.32 = 1,865.28/x
  3. Step 3: Cross multiply
    3,813.04x = 5,720.32 × 1,865.28
  4. Step 4: Simplify right side
    3,813.04x = 10,669,998.49
  5. Step 5: Solve for x
    x = 10,669,998.49/3,813.04
  6. Step 6: Final answer
    x = 2,798.29

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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.