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Finding the Fourth Proportional to 415.51, 622.02 and 252.70

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Solution

The fourth proportional to 415.51, 622.02 and 252.70 is: 378.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.51 : 622.02 = 252.70 : x
  2. Step 2: Convert to fraction form
    415.51/622.02 = 252.70/x
  3. Step 3: Cross multiply
    415.51x = 622.02 × 252.70
  4. Step 4: Simplify right side
    415.51x = 157,184.45
  5. Step 5: Solve for x
    x = 157,184.45/415.51
  6. Step 6: Final answer
    x = 378.29

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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.