Home / 1,578.06-2,177.82-1,315.62

Finding the Fourth Proportional to 1,578.06, 2,177.82 and 1,315.62

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Solution

The fourth proportional to 1,578.06, 2,177.82 and 1,315.62 is: 1,815.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.06 : 2,177.82 = 1,315.62 : x
  2. Step 2: Convert to fraction form
    1,578.06/2,177.82 = 1,315.62/x
  3. Step 3: Cross multiply
    1,578.06x = 2,177.82 × 1,315.62
  4. Step 4: Simplify right side
    1,578.06x = 2,865,183.55
  5. Step 5: Solve for x
    x = 2,865,183.55/1,578.06
  6. Step 6: Final answer
    x = 1,815.64

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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.