Home / 3,930.78-5,424.66-2,358.96

Finding the Fourth Proportional to 3,930.78, 5,424.66 and 2,358.96

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Solution

The fourth proportional to 3,930.78, 5,424.66 and 2,358.96 is: 3,255.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.78 : 5,424.66 = 2,358.96 : x
  2. Step 2: Convert to fraction form
    3,930.78/5,424.66 = 2,358.96/x
  3. Step 3: Cross multiply
    3,930.78x = 5,424.66 × 2,358.96
  4. Step 4: Simplify right side
    3,930.78x = 12,796,555.95
  5. Step 5: Solve for x
    x = 12,796,555.95/3,930.78
  6. Step 6: Final answer
    x = 3,255.47

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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.