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Finding the Fourth Proportional to 738.28, 1,018.89 and 443.50

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Solution

The fourth proportional to 738.28, 1,018.89 and 443.50 is: 612.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.28 : 1,018.89 = 443.50 : x
  2. Step 2: Convert to fraction form
    738.28/1,018.89 = 443.50/x
  3. Step 3: Cross multiply
    738.28x = 1,018.89 × 443.50
  4. Step 4: Simplify right side
    738.28x = 451,877.72
  5. Step 5: Solve for x
    x = 451,877.72/738.28
  6. Step 6: Final answer
    x = 612.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.