Home / 3,390.22-5,082.20-1,309.60

Finding the Fourth Proportional to 3,390.22, 5,082.20 and 1,309.60

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Solution

The fourth proportional to 3,390.22, 5,082.20 and 1,309.60 is: 1,963.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.22 : 5,082.20 = 1,309.60 : x
  2. Step 2: Convert to fraction form
    3,390.22/5,082.20 = 1,309.60/x
  3. Step 3: Cross multiply
    3,390.22x = 5,082.20 × 1,309.60
  4. Step 4: Simplify right side
    3,390.22x = 6,655,649.12
  5. Step 5: Solve for x
    x = 6,655,649.12/3,390.22
  6. Step 6: Final answer
    x = 1,963.19

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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.