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Finding the Fourth Proportional to 615.33, 849.08 and 379.40

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Solution

The fourth proportional to 615.33, 849.08 and 379.40 is: 523.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.33 : 849.08 = 379.40 : x
  2. Step 2: Convert to fraction form
    615.33/849.08 = 379.40/x
  3. Step 3: Cross multiply
    615.33x = 849.08 × 379.40
  4. Step 4: Simplify right side
    615.33x = 322,139.06
  5. Step 5: Solve for x
    x = 322,139.06/615.33
  6. Step 6: Final answer
    x = 523.52

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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.