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Finding the Fourth Proportional to 1,940.32, 2,910.44 and 479.45

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Solution

The fourth proportional to 1,940.32, 2,910.44 and 479.45 is: 719.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.32 : 2,910.44 = 479.45 : x
  2. Step 2: Convert to fraction form
    1,940.32/2,910.44 = 479.45/x
  3. Step 3: Cross multiply
    1,940.32x = 2,910.44 × 479.45
  4. Step 4: Simplify right side
    1,940.32x = 1,395,418.93
  5. Step 5: Solve for x
    x = 1,395,418.93/1,940.32
  6. Step 6: Final answer
    x = 719.17

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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.