Home / 2,578.05-3,557.70-1,399.11

Finding the Fourth Proportional to 2,578.05, 3,557.70 and 1,399.11

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Solution

The fourth proportional to 2,578.05, 3,557.70 and 1,399.11 is: 1,930.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.05 : 3,557.70 = 1,399.11 : x
  2. Step 2: Convert to fraction form
    2,578.05/3,557.70 = 1,399.11/x
  3. Step 3: Cross multiply
    2,578.05x = 3,557.70 × 1,399.11
  4. Step 4: Simplify right side
    2,578.05x = 4,977,613.65
  5. Step 5: Solve for x
    x = 4,977,613.65/2,578.05
  6. Step 6: Final answer
    x = 1,930.77

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1.5x scale

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.