Home / 3,220.10-4,830.42-911.60

Finding the Fourth Proportional to 3,220.10, 4,830.42 and 911.60

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Solution

The fourth proportional to 3,220.10, 4,830.42 and 911.60 is: 1,367.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220.10 : 4,830.42 = 911.60 : x
  2. Step 2: Convert to fraction form
    3,220.10/4,830.42 = 911.60/x
  3. Step 3: Cross multiply
    3,220.10x = 4,830.42 × 911.60
  4. Step 4: Simplify right side
    3,220.10x = 4,403,410.87
  5. Step 5: Solve for x
    x = 4,403,410.87/3,220.10
  6. Step 6: Final answer
    x = 1,367.48

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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.