Home / 3,620.88-5,427.66-1,431.15

Finding the Fourth Proportional to 3,620.88, 5,427.66 and 1,431.15

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Solution

The fourth proportional to 3,620.88, 5,427.66 and 1,431.15 is: 2,145.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.88 : 5,427.66 = 1,431.15 : x
  2. Step 2: Convert to fraction form
    3,620.88/5,427.66 = 1,431.15/x
  3. Step 3: Cross multiply
    3,620.88x = 5,427.66 × 1,431.15
  4. Step 4: Simplify right side
    3,620.88x = 7,767,795.61
  5. Step 5: Solve for x
    x = 7,767,795.61/3,620.88
  6. Step 6: Final answer
    x = 2,145.28

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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.