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Finding the Fourth Proportional to 739.38, 1,018.26 and 633.69

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Solution

The fourth proportional to 739.38, 1,018.26 and 633.69 is: 872.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.38 : 1,018.26 = 633.69 : x
  2. Step 2: Convert to fraction form
    739.38/1,018.26 = 633.69/x
  3. Step 3: Cross multiply
    739.38x = 1,018.26 × 633.69
  4. Step 4: Simplify right side
    739.38x = 645,261.18
  5. Step 5: Solve for x
    x = 645,261.18/739.38
  6. Step 6: Final answer
    x = 872.71

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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.