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Finding the Fourth Proportional to 523.22, 721.83 and 313.28

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Solution

The fourth proportional to 523.22, 721.83 and 313.28 is: 432.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.22 : 721.83 = 313.28 : x
  2. Step 2: Convert to fraction form
    523.22/721.83 = 313.28/x
  3. Step 3: Cross multiply
    523.22x = 721.83 × 313.28
  4. Step 4: Simplify right side
    523.22x = 226,131.29
  5. Step 5: Solve for x
    x = 226,131.29/523.22
  6. Step 6: Final answer
    x = 432.19

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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.