Home / 3,989.16-5,983.90-1,392.28

Finding the Fourth Proportional to 3,989.16, 5,983.90 and 1,392.28

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Solution

The fourth proportional to 3,989.16, 5,983.90 and 1,392.28 is: 2,088.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.16 : 5,983.90 = 1,392.28 : x
  2. Step 2: Convert to fraction form
    3,989.16/5,983.90 = 1,392.28/x
  3. Step 3: Cross multiply
    3,989.16x = 5,983.90 × 1,392.28
  4. Step 4: Simplify right side
    3,989.16x = 8,331,264.29
  5. Step 5: Solve for x
    x = 8,331,264.29/3,989.16
  6. Step 6: Final answer
    x = 2,088.48

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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.