Home / 3,820.64-5,727.31-1,221.80

Finding the Fourth Proportional to 3,820.64, 5,727.31 and 1,221.80

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Solution

The fourth proportional to 3,820.64, 5,727.31 and 1,221.80 is: 1,831.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,820.64 : 5,727.31 = 1,221.80 : x
  2. Step 2: Convert to fraction form
    3,820.64/5,727.31 = 1,221.80/x
  3. Step 3: Cross multiply
    3,820.64x = 5,727.31 × 1,221.80
  4. Step 4: Simplify right side
    3,820.64x = 6,997,595.67
  5. Step 5: Solve for x
    x = 6,997,595.67/3,820.64
  6. Step 6: Final answer
    x = 1,831.53

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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.