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Finding the Fourth Proportional to 738.45, 1,107.68 and 276.28

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Solution

The fourth proportional to 738.45, 1,107.68 and 276.28 is: 414.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.45 : 1,107.68 = 276.28 : x
  2. Step 2: Convert to fraction form
    738.45/1,107.68 = 276.28/x
  3. Step 3: Cross multiply
    738.45x = 1,107.68 × 276.28
  4. Step 4: Simplify right side
    738.45x = 306,025.68
  5. Step 5: Solve for x
    x = 306,025.68/738.45
  6. Step 6: Final answer
    x = 414.42

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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.