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Finding the Fourth Proportional to 1,940.58, 2,910.94 and 479.75

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Solution

The fourth proportional to 1,940.58, 2,910.94 and 479.75 is: 719.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.58 : 2,910.94 = 479.75 : x
  2. Step 2: Convert to fraction form
    1,940.58/2,910.94 = 479.75/x
  3. Step 3: Cross multiply
    1,940.58x = 2,910.94 × 479.75
  4. Step 4: Simplify right side
    1,940.58x = 1,396,507.71
  5. Step 5: Solve for x
    x = 1,396,507.71/1,940.58
  6. Step 6: Final answer
    x = 719.63

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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.