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Finding the Fourth Proportional to 393.33, 542.52 and 243.87

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Solution

The fourth proportional to 393.33, 542.52 and 243.87 is: 336.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.33 : 542.52 = 243.87 : x
  2. Step 2: Convert to fraction form
    393.33/542.52 = 243.87/x
  3. Step 3: Cross multiply
    393.33x = 542.52 × 243.87
  4. Step 4: Simplify right side
    393.33x = 132,304.35
  5. Step 5: Solve for x
    x = 132,304.35/393.33
  6. Step 6: Final answer
    x = 336.37

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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.