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Finding the Fourth Proportional to 1,294.10, 1,940.96 and 416.49

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Solution

The fourth proportional to 1,294.10, 1,940.96 and 416.49 is: 624.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.10 : 1,940.96 = 416.49 : x
  2. Step 2: Convert to fraction form
    1,294.10/1,940.96 = 416.49/x
  3. Step 3: Cross multiply
    1,294.10x = 1,940.96 × 416.49
  4. Step 4: Simplify right side
    1,294.10x = 808,390.43
  5. Step 5: Solve for x
    x = 808,390.43/1,294.10
  6. Step 6: Final answer
    x = 624.67

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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.