Home / 1,305.20-1,964.90-1,126.64

Finding the Fourth Proportional to 1,305.20, 1,964.90 and 1,126.64

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Solution

The fourth proportional to 1,305.20, 1,964.90 and 1,126.64 is: 1,696.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.20 : 1,964.90 = 1,126.64 : x
  2. Step 2: Convert to fraction form
    1,305.20/1,964.90 = 1,126.64/x
  3. Step 3: Cross multiply
    1,305.20x = 1,964.90 × 1,126.64
  4. Step 4: Simplify right side
    1,305.20x = 2,213,734.94
  5. Step 5: Solve for x
    x = 2,213,734.94/1,305.20
  6. Step 6: Final answer
    x = 1,696.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.