Home / 3,620.79-5,431.35-1,645.65

Finding the Fourth Proportional to 3,620.79, 5,431.35 and 1,645.65

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Solution

The fourth proportional to 3,620.79, 5,431.35 and 1,645.65 is: 2,468.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.79 : 5,431.35 = 1,645.65 : x
  2. Step 2: Convert to fraction form
    3,620.79/5,431.35 = 1,645.65/x
  3. Step 3: Cross multiply
    3,620.79x = 5,431.35 × 1,645.65
  4. Step 4: Simplify right side
    3,620.79x = 8,938,101.13
  5. Step 5: Solve for x
    x = 8,938,101.13/3,620.79
  6. Step 6: Final answer
    x = 2,468.55

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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.