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Finding the Fourth Proportional to 615.15, 849.13 and 379.13

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Solution

The fourth proportional to 615.15, 849.13 and 379.13 is: 523.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.15 : 849.13 = 379.13 : x
  2. Step 2: Convert to fraction form
    615.15/849.13 = 379.13/x
  3. Step 3: Cross multiply
    615.15x = 849.13 × 379.13
  4. Step 4: Simplify right side
    615.15x = 321,925.46
  5. Step 5: Solve for x
    x = 321,925.46/615.15
  6. Step 6: Final answer
    x = 523.33

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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.