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Finding the Fourth Proportional to 415.91, 573.92 and 229.40

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Solution

The fourth proportional to 415.91, 573.92 and 229.40 is: 316.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.91 : 573.92 = 229.40 : x
  2. Step 2: Convert to fraction form
    415.91/573.92 = 229.40/x
  3. Step 3: Cross multiply
    415.91x = 573.92 × 229.40
  4. Step 4: Simplify right side
    415.91x = 131,656.39
  5. Step 5: Solve for x
    x = 131,656.39/415.91
  6. Step 6: Final answer
    x = 316.55

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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.