Home / 3,720.74-5,580.50-1,380.20

Finding the Fourth Proportional to 3,720.74, 5,580.50 and 1,380.20

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Solution

The fourth proportional to 3,720.74, 5,580.50 and 1,380.20 is: 2,070.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.74 : 5,580.50 = 1,380.20 : x
  2. Step 2: Convert to fraction form
    3,720.74/5,580.50 = 1,380.20/x
  3. Step 3: Cross multiply
    3,720.74x = 5,580.50 × 1,380.20
  4. Step 4: Simplify right side
    3,720.74x = 7,702,178.20
  5. Step 5: Solve for x
    x = 7,702,178.20/3,720.74
  6. Step 6: Final answer
    x = 2,070.07

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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.