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Finding the Fourth Proportional to 615.89, 849.66 and 382.88

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Solution

The fourth proportional to 615.89, 849.66 and 382.88 is: 528.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.89 : 849.66 = 382.88 : x
  2. Step 2: Convert to fraction form
    615.89/849.66 = 382.88/x
  3. Step 3: Cross multiply
    615.89x = 849.66 × 382.88
  4. Step 4: Simplify right side
    615.89x = 325,317.82
  5. Step 5: Solve for x
    x = 325,317.82/615.89
  6. Step 6: Final answer
    x = 528.21

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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.