Home / 2,811.40-3,878.12-1,632.32

Finding the Fourth Proportional to 2,811.40, 3,878.12 and 1,632.32

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Solution

The fourth proportional to 2,811.40, 3,878.12 and 1,632.32 is: 2,251.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.40 : 3,878.12 = 1,632.32 : x
  2. Step 2: Convert to fraction form
    2,811.40/3,878.12 = 1,632.32/x
  3. Step 3: Cross multiply
    2,811.40x = 3,878.12 × 1,632.32
  4. Step 4: Simplify right side
    2,811.40x = 6,330,332.84
  5. Step 5: Solve for x
    x = 6,330,332.84/2,811.40
  6. Step 6: Final answer
    x = 2,251.67

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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.