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Finding the Fourth Proportional to 615.12, 849.16 and 379.12

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Solution

The fourth proportional to 615.12, 849.16 and 379.12 is: 523.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.12 : 849.16 = 379.12 : x
  2. Step 2: Convert to fraction form
    615.12/849.16 = 379.12/x
  3. Step 3: Cross multiply
    615.12x = 849.16 × 379.12
  4. Step 4: Simplify right side
    615.12x = 321,933.54
  5. Step 5: Solve for x
    x = 321,933.54/615.12
  6. Step 6: Final answer
    x = 523.37

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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.