Home / 1,412.27-2,118.75-438.37

Finding the Fourth Proportional to 1,412.27, 2,118.75 and 438.37

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Solution

The fourth proportional to 1,412.27, 2,118.75 and 438.37 is: 657.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.27 : 2,118.75 = 438.37 : x
  2. Step 2: Convert to fraction form
    1,412.27/2,118.75 = 438.37/x
  3. Step 3: Cross multiply
    1,412.27x = 2,118.75 × 438.37
  4. Step 4: Simplify right side
    1,412.27x = 928,797.44
  5. Step 5: Solve for x
    x = 928,797.44/1,412.27
  6. Step 6: Final answer
    x = 657.66

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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.