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Finding the Fourth Proportional to 726.94, 1,090.50 and 239.86

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Solution

The fourth proportional to 726.94, 1,090.50 and 239.86 is: 359.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.94 : 1,090.50 = 239.86 : x
  2. Step 2: Convert to fraction form
    726.94/1,090.50 = 239.86/x
  3. Step 3: Cross multiply
    726.94x = 1,090.50 × 239.86
  4. Step 4: Simplify right side
    726.94x = 261,567.33
  5. Step 5: Solve for x
    x = 261,567.33/726.94
  6. Step 6: Final answer
    x = 359.82

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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.