Home / 1,485.20-2,224.32-867.60

Finding the Fourth Proportional to 1,485.20, 2,224.32 and 867.60

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Solution

The fourth proportional to 1,485.20, 2,224.32 and 867.60 is: 1,299.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.20 : 2,224.32 = 867.60 : x
  2. Step 2: Convert to fraction form
    1,485.20/2,224.32 = 867.60/x
  3. Step 3: Cross multiply
    1,485.20x = 2,224.32 × 867.60
  4. Step 4: Simplify right side
    1,485.20x = 1,929,820.03
  5. Step 5: Solve for x
    x = 1,929,820.03/1,485.20
  6. Step 6: Final answer
    x = 1,299.37

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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.