Home / 1,455.20-2,181.22-480.60

Finding the Fourth Proportional to 1,455.20, 2,181.22 and 480.60

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Solution

The fourth proportional to 1,455.20, 2,181.22 and 480.60 is: 720.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.20 : 2,181.22 = 480.60 : x
  2. Step 2: Convert to fraction form
    1,455.20/2,181.22 = 480.60/x
  3. Step 3: Cross multiply
    1,455.20x = 2,181.22 × 480.60
  4. Step 4: Simplify right side
    1,455.20x = 1,048,294.33
  5. Step 5: Solve for x
    x = 1,048,294.33/1,455.20
  6. Step 6: Final answer
    x = 720.38

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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.