Home / 3,817.64-5,727.52-1,220.78

Finding the Fourth Proportional to 3,817.64, 5,727.52 and 1,220.78

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Solution

The fourth proportional to 3,817.64, 5,727.52 and 1,220.78 is: 1,831.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,817.64 : 5,727.52 = 1,220.78 : x
  2. Step 2: Convert to fraction form
    3,817.64/5,727.52 = 1,220.78/x
  3. Step 3: Cross multiply
    3,817.64x = 5,727.52 × 1,220.78
  4. Step 4: Simplify right side
    3,817.64x = 6,992,041.87
  5. Step 5: Solve for x
    x = 6,992,041.87/3,817.64
  6. Step 6: Final answer
    x = 1,831.51

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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.