Home / 1,020.75-1,531.19-336.75

Finding the Fourth Proportional to 1,020.75, 1,531.19 and 336.75

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Solution

The fourth proportional to 1,020.75, 1,531.19 and 336.75 is: 505.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.75 : 1,531.19 = 336.75 : x
  2. Step 2: Convert to fraction form
    1,020.75/1,531.19 = 336.75/x
  3. Step 3: Cross multiply
    1,020.75x = 1,531.19 × 336.75
  4. Step 4: Simplify right side
    1,020.75x = 515,626.55
  5. Step 5: Solve for x
    x = 515,626.55/1,020.75
  6. Step 6: Final answer
    x = 505.14

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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.