Home / 3,720.34-5,580.15-1,380.34

Finding the Fourth Proportional to 3,720.34, 5,580.15 and 1,380.34

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Solution

The fourth proportional to 3,720.34, 5,580.15 and 1,380.34 is: 2,070.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.34 : 5,580.15 = 1,380.34 : x
  2. Step 2: Convert to fraction form
    3,720.34/5,580.15 = 1,380.34/x
  3. Step 3: Cross multiply
    3,720.34x = 5,580.15 × 1,380.34
  4. Step 4: Simplify right side
    3,720.34x = 7,702,504.25
  5. Step 5: Solve for x
    x = 7,702,504.25/3,720.34
  6. Step 6: Final answer
    x = 2,070.38

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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.