Home / 1,217.19-1,678.62-1,040.82

Finding the Fourth Proportional to 1,217.19, 1,678.62 and 1,040.82

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Solution

The fourth proportional to 1,217.19, 1,678.62 and 1,040.82 is: 1,435.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.19 : 1,678.62 = 1,040.82 : x
  2. Step 2: Convert to fraction form
    1,217.19/1,678.62 = 1,040.82/x
  3. Step 3: Cross multiply
    1,217.19x = 1,678.62 × 1,040.82
  4. Step 4: Simplify right side
    1,217.19x = 1,747,138.88
  5. Step 5: Solve for x
    x = 1,747,138.88/1,217.19
  6. Step 6: Final answer
    x = 1,435.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.