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Finding the Fourth Proportional to 615.81, 849.82 and 353.91

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Solution

The fourth proportional to 615.81, 849.82 and 353.91 is: 488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.81 : 849.82 = 353.91 : x
  2. Step 2: Convert to fraction form
    615.81/849.82 = 353.91/x
  3. Step 3: Cross multiply
    615.81x = 849.82 × 353.91
  4. Step 4: Simplify right side
    615.81x = 300,759.80
  5. Step 5: Solve for x
    x = 300,759.80/615.81
  6. Step 6: Final answer
    x = 488.40

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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.