Home / 1,412.85-2,119.26-438.95

Finding the Fourth Proportional to 1,412.85, 2,119.26 and 438.95

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Solution

The fourth proportional to 1,412.85, 2,119.26 and 438.95 is: 658.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.85 : 2,119.26 = 438.95 : x
  2. Step 2: Convert to fraction form
    1,412.85/2,119.26 = 438.95/x
  3. Step 3: Cross multiply
    1,412.85x = 2,119.26 × 438.95
  4. Step 4: Simplify right side
    1,412.85x = 930,238.58
  5. Step 5: Solve for x
    x = 930,238.58/1,412.85
  6. Step 6: Final answer
    x = 658.41

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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.