Home / 1,325.28-1,986.54-447.48

Finding the Fourth Proportional to 1,325.28, 1,986.54 and 447.48

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Solution

The fourth proportional to 1,325.28, 1,986.54 and 447.48 is: 670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.28 : 1,986.54 = 447.48 : x
  2. Step 2: Convert to fraction form
    1,325.28/1,986.54 = 447.48/x
  3. Step 3: Cross multiply
    1,325.28x = 1,986.54 × 447.48
  4. Step 4: Simplify right side
    1,325.28x = 888,940.77
  5. Step 5: Solve for x
    x = 888,940.77/1,325.28
  6. Step 6: Final answer
    x = 670.76

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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.