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Finding the Fourth Proportional to 415.84, 622.80 and 199.36

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Solution

The fourth proportional to 415.84, 622.80 and 199.36 is: 298.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.84 : 622.80 = 199.36 : x
  2. Step 2: Convert to fraction form
    415.84/622.80 = 199.36/x
  3. Step 3: Cross multiply
    415.84x = 622.80 × 199.36
  4. Step 4: Simplify right side
    415.84x = 124,161.41
  5. Step 5: Solve for x
    x = 124,161.41/415.84
  6. Step 6: Final answer
    x = 298.58

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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.