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Finding the Fourth Proportional to 394.00, 542.43 and 342.23

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Solution

The fourth proportional to 394.00, 542.43 and 342.23 is: 471.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.00 : 542.43 = 342.23 : x
  2. Step 2: Convert to fraction form
    394.00/542.43 = 342.23/x
  3. Step 3: Cross multiply
    394.00x = 542.43 × 342.23
  4. Step 4: Simplify right side
    394.00x = 185,633.11
  5. Step 5: Solve for x
    x = 185,633.11/394.00
  6. Step 6: Final answer
    x = 471.15

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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.