Home / 3,872.19-5,806.47-1,405.29

Finding the Fourth Proportional to 3,872.19, 5,806.47 and 1,405.29

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Solution

The fourth proportional to 3,872.19, 5,806.47 and 1,405.29 is: 2,107.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.19 : 5,806.47 = 1,405.29 : x
  2. Step 2: Convert to fraction form
    3,872.19/5,806.47 = 1,405.29/x
  3. Step 3: Cross multiply
    3,872.19x = 5,806.47 × 1,405.29
  4. Step 4: Simplify right side
    3,872.19x = 8,159,774.23
  5. Step 5: Solve for x
    x = 8,159,774.23/3,872.19
  6. Step 6: Final answer
    x = 2,107.28

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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.