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Finding the Fourth Proportional to 523.31, 721.71 and 418.23

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Solution

The fourth proportional to 523.31, 721.71 and 418.23 is: 576.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.31 : 721.71 = 418.23 : x
  2. Step 2: Convert to fraction form
    523.31/721.71 = 418.23/x
  3. Step 3: Cross multiply
    523.31x = 721.71 × 418.23
  4. Step 4: Simplify right side
    523.31x = 301,840.77
  5. Step 5: Solve for x
    x = 301,840.77/523.31
  6. Step 6: Final answer
    x = 576.80

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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.