Home / 3,989.26-5,983.87-1,680.76

Finding the Fourth Proportional to 3,989.26, 5,983.87 and 1,680.76

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Solution

The fourth proportional to 3,989.26, 5,983.87 and 1,680.76 is: 2,521.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.26 : 5,983.87 = 1,680.76 : x
  2. Step 2: Convert to fraction form
    3,989.26/5,983.87 = 1,680.76/x
  3. Step 3: Cross multiply
    3,989.26x = 5,983.87 × 1,680.76
  4. Step 4: Simplify right side
    3,989.26x = 10,057,449.34
  5. Step 5: Solve for x
    x = 10,057,449.34/3,989.26
  6. Step 6: Final answer
    x = 2,521.13

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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.