Home / 2,218.40-3,325.20-985.60

Finding the Fourth Proportional to 2,218.40, 3,325.20 and 985.60

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Solution

The fourth proportional to 2,218.40, 3,325.20 and 985.60 is: 1,477.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.40 : 3,325.20 = 985.60 : x
  2. Step 2: Convert to fraction form
    2,218.40/3,325.20 = 985.60/x
  3. Step 3: Cross multiply
    2,218.40x = 3,325.20 × 985.60
  4. Step 4: Simplify right side
    2,218.40x = 3,277,317.12
  5. Step 5: Solve for x
    x = 3,277,317.12/2,218.40
  6. Step 6: Final answer
    x = 1,477.33

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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.