Home / 2,690.37-4,038.08-1,392.75

Finding the Fourth Proportional to 2,690.37, 4,038.08 and 1,392.75

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Solution

The fourth proportional to 2,690.37, 4,038.08 and 1,392.75 is: 2,090.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.37 : 4,038.08 = 1,392.75 : x
  2. Step 2: Convert to fraction form
    2,690.37/4,038.08 = 1,392.75/x
  3. Step 3: Cross multiply
    2,690.37x = 4,038.08 × 1,392.75
  4. Step 4: Simplify right side
    2,690.37x = 5,624,028.96
  5. Step 5: Solve for x
    x = 5,624,028.96/2,690.37
  6. Step 6: Final answer
    x = 2,090.43

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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.