Home / 3,990.22-5,985.56-1,216.99

Finding the Fourth Proportional to 3,990.22, 5,985.56 and 1,216.99

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Solution

The fourth proportional to 3,990.22, 5,985.56 and 1,216.99 is: 1,825.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.22 : 5,985.56 = 1,216.99 : x
  2. Step 2: Convert to fraction form
    3,990.22/5,985.56 = 1,216.99/x
  3. Step 3: Cross multiply
    3,990.22x = 5,985.56 × 1,216.99
  4. Step 4: Simplify right side
    3,990.22x = 7,284,366.66
  5. Step 5: Solve for x
    x = 7,284,366.66/3,990.22
  6. Step 6: Final answer
    x = 1,825.56

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Double scale
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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.