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Finding the Fourth Proportional to 392.64, 588.96 and 228.36

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Solution

The fourth proportional to 392.64, 588.96 and 228.36 is: 342.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.64 : 588.96 = 228.36 : x
  2. Step 2: Convert to fraction form
    392.64/588.96 = 228.36/x
  3. Step 3: Cross multiply
    392.64x = 588.96 × 228.36
  4. Step 4: Simplify right side
    392.64x = 134,494.91
  5. Step 5: Solve for x
    x = 134,494.91/392.64
  6. Step 6: Final answer
    x = 342.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.