Home / 3,990.18-5,986.17-1,217.10

Finding the Fourth Proportional to 3,990.18, 5,986.17 and 1,217.10

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Solution

The fourth proportional to 3,990.18, 5,986.17 and 1,217.10 is: 1,825.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.18 : 5,986.17 = 1,217.10 : x
  2. Step 2: Convert to fraction form
    3,990.18/5,986.17 = 1,217.10/x
  3. Step 3: Cross multiply
    3,990.18x = 5,986.17 × 1,217.10
  4. Step 4: Simplify right side
    3,990.18x = 7,285,767.51
  5. Step 5: Solve for x
    x = 7,285,767.51/3,990.18
  6. Step 6: Final answer
    x = 1,825.92

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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.