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Finding the Fourth Proportional to 393.96, 542.94 and 363.24

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Solution

The fourth proportional to 393.96, 542.94 and 363.24 is: 500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.96 : 542.94 = 363.24 : x
  2. Step 2: Convert to fraction form
    393.96/542.94 = 363.24/x
  3. Step 3: Cross multiply
    393.96x = 542.94 × 363.24
  4. Step 4: Simplify right side
    393.96x = 197,217.53
  5. Step 5: Solve for x
    x = 197,217.53/393.96
  6. Step 6: Final answer
    x = 500.60

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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.