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Finding the Fourth Proportional to 415.44, 622.61 and 210.15

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Solution

The fourth proportional to 415.44, 622.61 and 210.15 is: 314.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.44 : 622.61 = 210.15 : x
  2. Step 2: Convert to fraction form
    415.44/622.61 = 210.15/x
  3. Step 3: Cross multiply
    415.44x = 622.61 × 210.15
  4. Step 4: Simplify right side
    415.44x = 130,840.44
  5. Step 5: Solve for x
    x = 130,840.44/415.44
  6. Step 6: Final answer
    x = 314.94

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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.