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Finding the Fourth Proportional to 392.13, 587.30 and 229.95

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Solution

The fourth proportional to 392.13, 587.30 and 229.95 is: 344.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.13 : 587.30 = 229.95 : x
  2. Step 2: Convert to fraction form
    392.13/587.30 = 229.95/x
  3. Step 3: Cross multiply
    392.13x = 587.30 × 229.95
  4. Step 4: Simplify right side
    392.13x = 135,048.49
  5. Step 5: Solve for x
    x = 135,048.49/392.13
  6. Step 6: Final answer
    x = 344.40

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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.