Home / 3,620.85-5,431.28-1,771.47

Finding the Fourth Proportional to 3,620.85, 5,431.28 and 1,771.47

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Solution

The fourth proportional to 3,620.85, 5,431.28 and 1,771.47 is: 2,657.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.85 : 5,431.28 = 1,771.47 : x
  2. Step 2: Convert to fraction form
    3,620.85/5,431.28 = 1,771.47/x
  3. Step 3: Cross multiply
    3,620.85x = 5,431.28 × 1,771.47
  4. Step 4: Simplify right side
    3,620.85x = 9,621,345.71
  5. Step 5: Solve for x
    x = 9,621,345.71/3,620.85
  6. Step 6: Final answer
    x = 2,657.21

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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.