Home / 5,478.80-8,206.05-2,190.20

Finding the Fourth Proportional to 5,478.80, 8,206.05 and 2,190.20

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Solution

The fourth proportional to 5,478.80, 8,206.05 and 2,190.20 is: 3,280.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.80 : 8,206.05 = 2,190.20 : x
  2. Step 2: Convert to fraction form
    5,478.80/8,206.05 = 2,190.20/x
  3. Step 3: Cross multiply
    5,478.80x = 8,206.05 × 2,190.20
  4. Step 4: Simplify right side
    5,478.80x = 17,972,890.71
  5. Step 5: Solve for x
    x = 17,972,890.71/5,478.80
  6. Step 6: Final answer
    x = 3,280.44

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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.