Home / 3,920.20-5,880.18-1,322.92

Finding the Fourth Proportional to 3,920.20, 5,880.18 and 1,322.92

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Solution

The fourth proportional to 3,920.20, 5,880.18 and 1,322.92 is: 1,984.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.20 : 5,880.18 = 1,322.92 : x
  2. Step 2: Convert to fraction form
    3,920.20/5,880.18 = 1,322.92/x
  3. Step 3: Cross multiply
    3,920.20x = 5,880.18 × 1,322.92
  4. Step 4: Simplify right side
    3,920.20x = 7,779,007.73
  5. Step 5: Solve for x
    x = 7,779,007.73/3,920.20
  6. Step 6: Final answer
    x = 1,984.34

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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.