Home / 3,520.42-5,280.64-1,328.64

Finding the Fourth Proportional to 3,520.42, 5,280.64 and 1,328.64

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Solution

The fourth proportional to 3,520.42, 5,280.64 and 1,328.64 is: 1,992.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,520.42 : 5,280.64 = 1,328.64 : x
  2. Step 2: Convert to fraction form
    3,520.42/5,280.64 = 1,328.64/x
  3. Step 3: Cross multiply
    3,520.42x = 5,280.64 × 1,328.64
  4. Step 4: Simplify right side
    3,520.42x = 7,016,069.53
  5. Step 5: Solve for x
    x = 7,016,069.53/3,520.42
  6. Step 6: Final answer
    x = 1,992.96

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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.