Home / 3,990.54-5,983.96-1,217.51

Finding the Fourth Proportional to 3,990.54, 5,983.96 and 1,217.51

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Solution

The fourth proportional to 3,990.54, 5,983.96 and 1,217.51 is: 1,825.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.54 : 5,983.96 = 1,217.51 : x
  2. Step 2: Convert to fraction form
    3,990.54/5,983.96 = 1,217.51/x
  3. Step 3: Cross multiply
    3,990.54x = 5,983.96 × 1,217.51
  4. Step 4: Simplify right side
    3,990.54x = 7,285,531.14
  5. Step 5: Solve for x
    x = 7,285,531.14/3,990.54
  6. Step 6: Final answer
    x = 1,825.70

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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.