Home / 1,410.40-2,115.96-825.90

Finding the Fourth Proportional to 1,410.40, 2,115.96 and 825.90

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Solution

The fourth proportional to 1,410.40, 2,115.96 and 825.90 is: 1,239.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.40 : 2,115.96 = 825.90 : x
  2. Step 2: Convert to fraction form
    1,410.40/2,115.96 = 825.90/x
  3. Step 3: Cross multiply
    1,410.40x = 2,115.96 × 825.90
  4. Step 4: Simplify right side
    1,410.40x = 1,747,571.36
  5. Step 5: Solve for x
    x = 1,747,571.36/1,410.40
  6. Step 6: Final answer
    x = 1,239.06

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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.