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Finding the Fourth Proportional to 3,681.80, 5,511.90 and 2,223.80

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Solution

The fourth proportional to 3,681.80, 5,511.90 and 2,223.80 is: 3,329.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,681.80 : 5,511.90 = 2,223.80 : x
  2. Step 2: Convert to fraction form
    3,681.80/5,511.90 = 2,223.80/x
  3. Step 3: Cross multiply
    3,681.80x = 5,511.90 × 2,223.80
  4. Step 4: Simplify right side
    3,681.80x = 12,257,363.22
  5. Step 5: Solve for x
    x = 12,257,363.22/3,681.80
  6. Step 6: Final answer
    x = 3,329.18

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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.