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Finding the Fourth Proportional to 1,293.16, 1,940.79 and 738.22

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Solution

The fourth proportional to 1,293.16, 1,940.79 and 738.22 is: 1,107.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.16 : 1,940.79 = 738.22 : x
  2. Step 2: Convert to fraction form
    1,293.16/1,940.79 = 738.22/x
  3. Step 3: Cross multiply
    1,293.16x = 1,940.79 × 738.22
  4. Step 4: Simplify right side
    1,293.16x = 1,432,729.99
  5. Step 5: Solve for x
    x = 1,432,729.99/1,293.16
  6. Step 6: Final answer
    x = 1,107.93

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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.