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Finding the Fourth Proportional to 615.19, 849.03 and 379.09

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Solution

The fourth proportional to 615.19, 849.03 and 379.09 is: 523.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.19 : 849.03 = 379.09 : x
  2. Step 2: Convert to fraction form
    615.19/849.03 = 379.09/x
  3. Step 3: Cross multiply
    615.19x = 849.03 × 379.09
  4. Step 4: Simplify right side
    615.19x = 321,858.78
  5. Step 5: Solve for x
    x = 321,858.78/615.19
  6. Step 6: Final answer
    x = 523.19

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Double scale
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Similar ratio
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1.5x scale

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.