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Finding the Fourth Proportional to 3,920.52, 5,880.36 and 1,323.12

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Solution

The fourth proportional to 3,920.52, 5,880.36 and 1,323.12 is: 1,984.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.52 : 5,880.36 = 1,323.12 : x
  2. Step 2: Convert to fraction form
    3,920.52/5,880.36 = 1,323.12/x
  3. Step 3: Cross multiply
    3,920.52x = 5,880.36 × 1,323.12
  4. Step 4: Simplify right side
    3,920.52x = 7,780,421.92
  5. Step 5: Solve for x
    x = 7,780,421.92/3,920.52
  6. Step 6: Final answer
    x = 1,984.54

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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.