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Finding the Fourth Proportional to 738.47, 1,107.68 and 299.60

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Solution

The fourth proportional to 738.47, 1,107.68 and 299.60 is: 449.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.47 : 1,107.68 = 299.60 : x
  2. Step 2: Convert to fraction form
    738.47/1,107.68 = 299.60/x
  3. Step 3: Cross multiply
    738.47x = 1,107.68 × 299.60
  4. Step 4: Simplify right side
    738.47x = 331,862.85
  5. Step 5: Solve for x
    x = 331,862.85/738.47
  6. Step 6: Final answer
    x = 449.39

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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.