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Finding the Fourth Proportional to 615.82, 850.17 and 419.62

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Solution

The fourth proportional to 615.82, 850.17 and 419.62 is: 579.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.82 : 850.17 = 419.62 : x
  2. Step 2: Convert to fraction form
    615.82/850.17 = 419.62/x
  3. Step 3: Cross multiply
    615.82x = 850.17 × 419.62
  4. Step 4: Simplify right side
    615.82x = 356,748.34
  5. Step 5: Solve for x
    x = 356,748.34/615.82
  6. Step 6: Final answer
    x = 579.31

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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.