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Finding the Fourth Proportional to 1,294.36, 1,940.94 and 416.70

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Solution

The fourth proportional to 1,294.36, 1,940.94 and 416.70 is: 624.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.36 : 1,940.94 = 416.70 : x
  2. Step 2: Convert to fraction form
    1,294.36/1,940.94 = 416.70/x
  3. Step 3: Cross multiply
    1,294.36x = 1,940.94 × 416.70
  4. Step 4: Simplify right side
    1,294.36x = 808,789.70
  5. Step 5: Solve for x
    x = 808,789.70/1,294.36
  6. Step 6: Final answer
    x = 624.86

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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.