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Finding the Fourth Proportional to 500.40, 750.38 and 324.42

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Solution

The fourth proportional to 500.40, 750.38 and 324.42 is: 486.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.40 : 750.38 = 324.42 : x
  2. Step 2: Convert to fraction form
    500.40/750.38 = 324.42/x
  3. Step 3: Cross multiply
    500.40x = 750.38 × 324.42
  4. Step 4: Simplify right side
    500.40x = 243,436.66
  5. Step 5: Solve for x
    x = 243,436.66/500.40
  6. Step 6: Final answer
    x = 486.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.