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Finding the Fourth Proportional to 739.27, 1,019.91 and 459.43

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Solution

The fourth proportional to 739.27, 1,019.91 and 459.43 is: 633.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.27 : 1,019.91 = 459.43 : x
  2. Step 2: Convert to fraction form
    739.27/1,019.91 = 459.43/x
  3. Step 3: Cross multiply
    739.27x = 1,019.91 × 459.43
  4. Step 4: Simplify right side
    739.27x = 468,577.25
  5. Step 5: Solve for x
    x = 468,577.25/739.27
  6. Step 6: Final answer
    x = 633.84

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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.