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Finding the Fourth Proportional to 615.74, 849.75 and 353.76

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Solution

The fourth proportional to 615.74, 849.75 and 353.76 is: 488.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.74 : 849.75 = 353.76 : x
  2. Step 2: Convert to fraction form
    615.74/849.75 = 353.76/x
  3. Step 3: Cross multiply
    615.74x = 849.75 × 353.76
  4. Step 4: Simplify right side
    615.74x = 300,607.56
  5. Step 5: Solve for x
    x = 300,607.56/615.74
  6. Step 6: Final answer
    x = 488.21

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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.