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Finding the Fourth Proportional to 615.69, 849.69 and 353.79

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Solution

The fourth proportional to 615.69, 849.69 and 353.79 is: 488.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.69 : 849.69 = 353.79 : x
  2. Step 2: Convert to fraction form
    615.69/849.69 = 353.79/x
  3. Step 3: Cross multiply
    615.69x = 849.69 × 353.79
  4. Step 4: Simplify right side
    615.69x = 300,611.83
  5. Step 5: Solve for x
    x = 300,611.83/615.69
  6. Step 6: Final answer
    x = 488.25

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Double scale
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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.