Home / 3,989.60-5,985.27-1,216.20

Finding the Fourth Proportional to 3,989.60, 5,985.27 and 1,216.20

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Solution

The fourth proportional to 3,989.60, 5,985.27 and 1,216.20 is: 1,824.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.60 : 5,985.27 = 1,216.20 : x
  2. Step 2: Convert to fraction form
    3,989.60/5,985.27 = 1,216.20/x
  3. Step 3: Cross multiply
    3,989.60x = 5,985.27 × 1,216.20
  4. Step 4: Simplify right side
    3,989.60x = 7,279,285.37
  5. Step 5: Solve for x
    x = 7,279,285.37/3,989.60
  6. Step 6: Final answer
    x = 1,824.57

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Similar ratio
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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.