Home / 3,222.80-4,831.56-1,372.40

Finding the Fourth Proportional to 3,222.80, 4,831.56 and 1,372.40

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Solution

The fourth proportional to 3,222.80, 4,831.56 and 1,372.40 is: 2,057.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,222.80 : 4,831.56 = 1,372.40 : x
  2. Step 2: Convert to fraction form
    3,222.80/4,831.56 = 1,372.40/x
  3. Step 3: Cross multiply
    3,222.80x = 4,831.56 × 1,372.40
  4. Step 4: Simplify right side
    3,222.80x = 6,630,832.94
  5. Step 5: Solve for x
    x = 6,630,832.94/3,222.80
  6. Step 6: Final answer
    x = 2,057.48

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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.