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Finding the Fourth Proportional to 501.68, 691.90 and 324.53

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Solution

The fourth proportional to 501.68, 691.90 and 324.53 is: 447.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.68 : 691.90 = 324.53 : x
  2. Step 2: Convert to fraction form
    501.68/691.90 = 324.53/x
  3. Step 3: Cross multiply
    501.68x = 691.90 × 324.53
  4. Step 4: Simplify right side
    501.68x = 224,542.31
  5. Step 5: Solve for x
    x = 224,542.31/501.68
  6. Step 6: Final answer
    x = 447.58

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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.