Home / 3,721.20-5,582.45-1,720

Finding the Fourth Proportional to 3,721.20, 5,582.45 and 1,720

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Solution

The fourth proportional to 3,721.20, 5,582.45 and 1,720 is: 2,580.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.20 : 5,582.45 = 1,720 : x
  2. Step 2: Convert to fraction form
    3,721.20/5,582.45 = 1,720/x
  3. Step 3: Cross multiply
    3,721.20x = 5,582.45 × 1,720
  4. Step 4: Simplify right side
    3,721.20x = 9,601,814
  5. Step 5: Solve for x
    x = 9,601,814/3,721.20
  6. Step 6: Final answer
    x = 2,580.30

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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.