Home / 3,280.06-4,920.40-1,089

Finding the Fourth Proportional to 3,280.06, 4,920.40 and 1,089

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Solution

The fourth proportional to 3,280.06, 4,920.40 and 1,089 is: 1,633.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.06 : 4,920.40 = 1,089 : x
  2. Step 2: Convert to fraction form
    3,280.06/4,920.40 = 1,089/x
  3. Step 3: Cross multiply
    3,280.06x = 4,920.40 × 1,089
  4. Step 4: Simplify right side
    3,280.06x = 5,358,315.60
  5. Step 5: Solve for x
    x = 5,358,315.60/3,280.06
  6. Step 6: Final answer
    x = 1,633.60

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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.