Home / 3,990.48-5,983.44-1,647.72

Finding the Fourth Proportional to 3,990.48, 5,983.44 and 1,647.72

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Solution

The fourth proportional to 3,990.48, 5,983.44 and 1,647.72 is: 2,470.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.48 : 5,983.44 = 1,647.72 : x
  2. Step 2: Convert to fraction form
    3,990.48/5,983.44 = 1,647.72/x
  3. Step 3: Cross multiply
    3,990.48x = 5,983.44 × 1,647.72
  4. Step 4: Simplify right side
    3,990.48x = 9,859,033.76
  5. Step 5: Solve for x
    x = 9,859,033.76/3,990.48
  6. Step 6: Final answer
    x = 2,470.64

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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.