Home / 1,217.19-1,825.38-486.57

Finding the Fourth Proportional to 1,217.19, 1,825.38 and 486.57

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Solution

The fourth proportional to 1,217.19, 1,825.38 and 486.57 is: 729.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.19 : 1,825.38 = 486.57 : x
  2. Step 2: Convert to fraction form
    1,217.19/1,825.38 = 486.57/x
  3. Step 3: Cross multiply
    1,217.19x = 1,825.38 × 486.57
  4. Step 4: Simplify right side
    1,217.19x = 888,175.15
  5. Step 5: Solve for x
    x = 888,175.15/1,217.19
  6. Step 6: Final answer
    x = 729.69

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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.