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Finding the Fourth Proportional to 415.71, 573.68 and 229.21

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Solution

The fourth proportional to 415.71, 573.68 and 229.21 is: 316.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.71 : 573.68 = 229.21 : x
  2. Step 2: Convert to fraction form
    415.71/573.68 = 229.21/x
  3. Step 3: Cross multiply
    415.71x = 573.68 × 229.21
  4. Step 4: Simplify right side
    415.71x = 131,492.55
  5. Step 5: Solve for x
    x = 131,492.55/415.71
  6. Step 6: Final answer
    x = 316.31

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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.