Home / 1,421.38-2,132.21-447.22

Finding the Fourth Proportional to 1,421.38, 2,132.21 and 447.22

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Solution

The fourth proportional to 1,421.38, 2,132.21 and 447.22 is: 670.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.38 : 2,132.21 = 447.22 : x
  2. Step 2: Convert to fraction form
    1,421.38/2,132.21 = 447.22/x
  3. Step 3: Cross multiply
    1,421.38x = 2,132.21 × 447.22
  4. Step 4: Simplify right side
    1,421.38x = 953,566.96
  5. Step 5: Solve for x
    x = 953,566.96/1,421.38
  6. Step 6: Final answer
    x = 670.87

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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.