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Finding the Fourth Proportional to 738.03, 1,105.71 and 408.63

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Solution

The fourth proportional to 738.03, 1,105.71 and 408.63 is: 612.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.03 : 1,105.71 = 408.63 : x
  2. Step 2: Convert to fraction form
    738.03/1,105.71 = 408.63/x
  3. Step 3: Cross multiply
    738.03x = 1,105.71 × 408.63
  4. Step 4: Simplify right side
    738.03x = 451,826.28
  5. Step 5: Solve for x
    x = 451,826.28/738.03
  6. Step 6: Final answer
    x = 612.21

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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.