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Finding the Fourth Proportional to 393.00, 542.07 and 235.51

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Solution

The fourth proportional to 393.00, 542.07 and 235.51 is: 324.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.00 : 542.07 = 235.51 : x
  2. Step 2: Convert to fraction form
    393.00/542.07 = 235.51/x
  3. Step 3: Cross multiply
    393.00x = 542.07 × 235.51
  4. Step 4: Simplify right side
    393.00x = 127,662.91
  5. Step 5: Solve for x
    x = 127,662.91/393.00
  6. Step 6: Final answer
    x = 324.85

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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.