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Finding the Fourth Proportional to 738.26, 1,018.22 and 443.48

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Solution

The fourth proportional to 738.26, 1,018.22 and 443.48 is: 611.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.26 : 1,018.22 = 443.48 : x
  2. Step 2: Convert to fraction form
    738.26/1,018.22 = 443.48/x
  3. Step 3: Cross multiply
    738.26x = 1,018.22 × 443.48
  4. Step 4: Simplify right side
    738.26x = 451,560.21
  5. Step 5: Solve for x
    x = 451,560.21/738.26
  6. Step 6: Final answer
    x = 611.65

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1.5x scale

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.