Home / 3,990.10-5,985.34-1,217.18

Finding the Fourth Proportional to 3,990.10, 5,985.34 and 1,217.18

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Solution

The fourth proportional to 3,990.10, 5,985.34 and 1,217.18 is: 1,825.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.10 : 5,985.34 = 1,217.18 : x
  2. Step 2: Convert to fraction form
    3,990.10/5,985.34 = 1,217.18/x
  3. Step 3: Cross multiply
    3,990.10x = 5,985.34 × 1,217.18
  4. Step 4: Simplify right side
    3,990.10x = 7,285,236.14
  5. Step 5: Solve for x
    x = 7,285,236.14/3,990.10
  6. Step 6: Final answer
    x = 1,825.83

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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.