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Finding the Fourth Proportional to 523.07, 726.68 and 518.31

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Solution

The fourth proportional to 523.07, 726.68 and 518.31 is: 720.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.07 : 726.68 = 518.31 : x
  2. Step 2: Convert to fraction form
    523.07/726.68 = 518.31/x
  3. Step 3: Cross multiply
    523.07x = 726.68 × 518.31
  4. Step 4: Simplify right side
    523.07x = 376,645.51
  5. Step 5: Solve for x
    x = 376,645.51/523.07
  6. Step 6: Final answer
    x = 720.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.