Home / 1,217.38-1,825.21-426.54

Finding the Fourth Proportional to 1,217.38, 1,825.21 and 426.54

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Solution

The fourth proportional to 1,217.38, 1,825.21 and 426.54 is: 639.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.38 : 1,825.21 = 426.54 : x
  2. Step 2: Convert to fraction form
    1,217.38/1,825.21 = 426.54/x
  3. Step 3: Cross multiply
    1,217.38x = 1,825.21 × 426.54
  4. Step 4: Simplify right side
    1,217.38x = 778,522.94
  5. Step 5: Solve for x
    x = 778,522.94/1,217.38
  6. Step 6: Final answer
    x = 639.51

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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.