Home / 2,831.20-3,907.38-2,740.48

Finding the Fourth Proportional to 2,831.20, 3,907.38 and 2,740.48

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Solution

The fourth proportional to 2,831.20, 3,907.38 and 2,740.48 is: 3,782.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.20 : 3,907.38 = 2,740.48 : x
  2. Step 2: Convert to fraction form
    2,831.20/3,907.38 = 2,740.48/x
  3. Step 3: Cross multiply
    2,831.20x = 3,907.38 × 2,740.48
  4. Step 4: Simplify right side
    2,831.20x = 10,708,096.74
  5. Step 5: Solve for x
    x = 10,708,096.74/2,831.20
  6. Step 6: Final answer
    x = 3,782.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.