Home / 3,820.28-5,727.62-1,221.72

Finding the Fourth Proportional to 3,820.28, 5,727.62 and 1,221.72

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Solution

The fourth proportional to 3,820.28, 5,727.62 and 1,221.72 is: 1,831.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,820.28 : 5,727.62 = 1,221.72 : x
  2. Step 2: Convert to fraction form
    3,820.28/5,727.62 = 1,221.72/x
  3. Step 3: Cross multiply
    3,820.28x = 5,727.62 × 1,221.72
  4. Step 4: Simplify right side
    3,820.28x = 6,997,547.91
  5. Step 5: Solve for x
    x = 6,997,547.91/3,820.28
  6. Step 6: Final answer
    x = 1,831.68

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1.5x scale

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.