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Finding the Fourth Proportional to 3,157.12, 4,357.74 and 1,831.12

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Solution

The fourth proportional to 3,157.12, 4,357.74 and 1,831.12 is: 2,527.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,157.12 : 4,357.74 = 1,831.12 : x
  2. Step 2: Convert to fraction form
    3,157.12/4,357.74 = 1,831.12/x
  3. Step 3: Cross multiply
    3,157.12x = 4,357.74 × 1,831.12
  4. Step 4: Simplify right side
    3,157.12x = 7,979,544.87
  5. Step 5: Solve for x
    x = 7,979,544.87/3,157.12
  6. Step 6: Final answer
    x = 2,527.48

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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.