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Finding the Fourth Proportional to 615.40, 849.34 and 353.41

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Solution

The fourth proportional to 615.40, 849.34 and 353.41 is: 487.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.40 : 849.34 = 353.41 : x
  2. Step 2: Convert to fraction form
    615.40/849.34 = 353.41/x
  3. Step 3: Cross multiply
    615.40x = 849.34 × 353.41
  4. Step 4: Simplify right side
    615.40x = 300,166.36
  5. Step 5: Solve for x
    x = 300,166.36/615.40
  6. Step 6: Final answer
    x = 487.76

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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.