Home / 1,023.42-1,531.26-628.21

Finding the Fourth Proportional to 1,023.42, 1,531.26 and 628.21

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Solution

The fourth proportional to 1,023.42, 1,531.26 and 628.21 is: 939.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.42 : 1,531.26 = 628.21 : x
  2. Step 2: Convert to fraction form
    1,023.42/1,531.26 = 628.21/x
  3. Step 3: Cross multiply
    1,023.42x = 1,531.26 × 628.21
  4. Step 4: Simplify right side
    1,023.42x = 961,952.84
  5. Step 5: Solve for x
    x = 961,952.84/1,023.42
  6. Step 6: Final answer
    x = 939.94

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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.