Home / 1,426.56-2,139.90-696.75

Finding the Fourth Proportional to 1,426.56, 2,139.90 and 696.75

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Solution

The fourth proportional to 1,426.56, 2,139.90 and 696.75 is: 1,045.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.56 : 2,139.90 = 696.75 : x
  2. Step 2: Convert to fraction form
    1,426.56/2,139.90 = 696.75/x
  3. Step 3: Cross multiply
    1,426.56x = 2,139.90 × 696.75
  4. Step 4: Simplify right side
    1,426.56x = 1,490,975.33
  5. Step 5: Solve for x
    x = 1,490,975.33/1,426.56
  6. Step 6: Final answer
    x = 1,045.15

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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.