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Finding the Fourth Proportional to 523.51, 721.94 and 313.65

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Solution

The fourth proportional to 523.51, 721.94 and 313.65 is: 432.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.51 : 721.94 = 313.65 : x
  2. Step 2: Convert to fraction form
    523.51/721.94 = 313.65/x
  3. Step 3: Cross multiply
    523.51x = 721.94 × 313.65
  4. Step 4: Simplify right side
    523.51x = 226,437.27
  5. Step 5: Solve for x
    x = 226,437.27/523.51
  6. Step 6: Final answer
    x = 432.54

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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.