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Finding the Fourth Proportional to 392.82, 541.66 and 353.64

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Solution

The fourth proportional to 392.82, 541.66 and 353.64 is: 487.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.82 : 541.66 = 353.64 : x
  2. Step 2: Convert to fraction form
    392.82/541.66 = 353.64/x
  3. Step 3: Cross multiply
    392.82x = 541.66 × 353.64
  4. Step 4: Simplify right side
    392.82x = 191,552.64
  5. Step 5: Solve for x
    x = 191,552.64/392.82
  6. Step 6: Final answer
    x = 487.63

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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.