Home / 3,942.80-5,913.80-1,345.70

Finding the Fourth Proportional to 3,942.80, 5,913.80 and 1,345.70

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Solution

The fourth proportional to 3,942.80, 5,913.80 and 1,345.70 is: 2,018.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.80 : 5,913.80 = 1,345.70 : x
  2. Step 2: Convert to fraction form
    3,942.80/5,913.80 = 1,345.70/x
  3. Step 3: Cross multiply
    3,942.80x = 5,913.80 × 1,345.70
  4. Step 4: Simplify right side
    3,942.80x = 7,958,200.66
  5. Step 5: Solve for x
    x = 7,958,200.66/3,942.80
  6. Step 6: Final answer
    x = 2,018.41

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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.