Home / 1,421.42-2,132.32-447.18

Finding the Fourth Proportional to 1,421.42, 2,132.32 and 447.18

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Solution

The fourth proportional to 1,421.42, 2,132.32 and 447.18 is: 670.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.42 : 2,132.32 = 447.18 : x
  2. Step 2: Convert to fraction form
    1,421.42/2,132.32 = 447.18/x
  3. Step 3: Cross multiply
    1,421.42x = 2,132.32 × 447.18
  4. Step 4: Simplify right side
    1,421.42x = 953,530.86
  5. Step 5: Solve for x
    x = 953,530.86/1,421.42
  6. Step 6: Final answer
    x = 670.83

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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.