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Finding the Fourth Proportional to 615.70, 849.69 and 353.77

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Solution

The fourth proportional to 615.70, 849.69 and 353.77 is: 488.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.70 : 849.69 = 353.77 : x
  2. Step 2: Convert to fraction form
    615.70/849.69 = 353.77/x
  3. Step 3: Cross multiply
    615.70x = 849.69 × 353.77
  4. Step 4: Simplify right side
    615.70x = 300,592.71
  5. Step 5: Solve for x
    x = 300,592.71/615.70
  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.