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Finding the Fourth Proportional to 392.36, 539.52 and 348.62

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Solution

The fourth proportional to 392.36, 539.52 and 348.62 is: 479.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.36 : 539.52 = 348.62 : x
  2. Step 2: Convert to fraction form
    392.36/539.52 = 348.62/x
  3. Step 3: Cross multiply
    392.36x = 539.52 × 348.62
  4. Step 4: Simplify right side
    392.36x = 188,087.46
  5. Step 5: Solve for x
    x = 188,087.46/392.36
  6. Step 6: Final answer
    x = 479.37

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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.