Home / 1,021.22-1,531.83-251.72

Finding the Fourth Proportional to 1,021.22, 1,531.83 and 251.72

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Solution

The fourth proportional to 1,021.22, 1,531.83 and 251.72 is: 377.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.22 : 1,531.83 = 251.72 : x
  2. Step 2: Convert to fraction form
    1,021.22/1,531.83 = 251.72/x
  3. Step 3: Cross multiply
    1,021.22x = 1,531.83 × 251.72
  4. Step 4: Simplify right side
    1,021.22x = 385,589.86
  5. Step 5: Solve for x
    x = 385,589.86/1,021.22
  6. Step 6: Final answer
    x = 377.58

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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.