Home / 2,112.10-3,168.66-651.28

Finding the Fourth Proportional to 2,112.10, 3,168.66 and 651.28

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Solution

The fourth proportional to 2,112.10, 3,168.66 and 651.28 is: 977.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.10 : 3,168.66 = 651.28 : x
  2. Step 2: Convert to fraction form
    2,112.10/3,168.66 = 651.28/x
  3. Step 3: Cross multiply
    2,112.10x = 3,168.66 × 651.28
  4. Step 4: Simplify right side
    2,112.10x = 2,063,684.88
  5. Step 5: Solve for x
    x = 2,063,684.88/2,112.10
  6. Step 6: Final answer
    x = 977.08

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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.