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Finding the Fourth Proportional to 392.12, 585.02 and 351.08

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Solution

The fourth proportional to 392.12, 585.02 and 351.08 is: 523.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.12 : 585.02 = 351.08 : x
  2. Step 2: Convert to fraction form
    392.12/585.02 = 351.08/x
  3. Step 3: Cross multiply
    392.12x = 585.02 × 351.08
  4. Step 4: Simplify right side
    392.12x = 205,388.82
  5. Step 5: Solve for x
    x = 205,388.82/392.12
  6. Step 6: Final answer
    x = 523.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.