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Finding the Fourth Proportional to 501.75, 691.83 and 326.79

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Solution

The fourth proportional to 501.75, 691.83 and 326.79 is: 450.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.75 : 691.83 = 326.79 : x
  2. Step 2: Convert to fraction form
    501.75/691.83 = 326.79/x
  3. Step 3: Cross multiply
    501.75x = 691.83 × 326.79
  4. Step 4: Simplify right side
    501.75x = 226,083.13
  5. Step 5: Solve for x
    x = 226,083.13/501.75
  6. Step 6: Final answer
    x = 450.59

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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.