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Finding the Fourth Proportional to 415.18, 621.96 and 379.54

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Solution

The fourth proportional to 415.18, 621.96 and 379.54 is: 568.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.18 : 621.96 = 379.54 : x
  2. Step 2: Convert to fraction form
    415.18/621.96 = 379.54/x
  3. Step 3: Cross multiply
    415.18x = 621.96 × 379.54
  4. Step 4: Simplify right side
    415.18x = 236,058.70
  5. Step 5: Solve for x
    x = 236,058.70/415.18
  6. Step 6: Final answer
    x = 568.57

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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.