Home / 1,421.43-2,131.40-447.27

Finding the Fourth Proportional to 1,421.43, 2,131.40 and 447.27

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Solution

The fourth proportional to 1,421.43, 2,131.40 and 447.27 is: 670.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.43 : 2,131.40 = 447.27 : x
  2. Step 2: Convert to fraction form
    1,421.43/2,131.40 = 447.27/x
  3. Step 3: Cross multiply
    1,421.43x = 2,131.40 × 447.27
  4. Step 4: Simplify right side
    1,421.43x = 953,301.89
  5. Step 5: Solve for x
    x = 953,301.89/1,421.43
  6. Step 6: Final answer
    x = 670.67

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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.