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Finding the Fourth Proportional to 392.69, 542.03 and 348.75

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Solution

The fourth proportional to 392.69, 542.03 and 348.75 is: 481.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.69 : 542.03 = 348.75 : x
  2. Step 2: Convert to fraction form
    392.69/542.03 = 348.75/x
  3. Step 3: Cross multiply
    392.69x = 542.03 × 348.75
  4. Step 4: Simplify right side
    392.69x = 189,031.22
  5. Step 5: Solve for x
    x = 189,031.22/392.69
  6. Step 6: Final answer
    x = 481.37

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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.