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Finding the Fourth Proportional to 501.48, 691.72 and 326.52

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Solution

The fourth proportional to 501.48, 691.72 and 326.52 is: 450.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.48 : 691.72 = 326.52 : x
  2. Step 2: Convert to fraction form
    501.48/691.72 = 326.52/x
  3. Step 3: Cross multiply
    501.48x = 691.72 × 326.52
  4. Step 4: Simplify right side
    501.48x = 225,860.41
  5. Step 5: Solve for x
    x = 225,860.41/501.48
  6. Step 6: Final answer
    x = 450.39

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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.