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Finding the Fourth Proportional to 615.31, 849.13 and 339.31

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Solution

The fourth proportional to 615.31, 849.13 and 339.31 is: 468.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.31 : 849.13 = 339.31 : x
  2. Step 2: Convert to fraction form
    615.31/849.13 = 339.31/x
  3. Step 3: Cross multiply
    615.31x = 849.13 × 339.31
  4. Step 4: Simplify right side
    615.31x = 288,118.30
  5. Step 5: Solve for x
    x = 288,118.30/615.31
  6. Step 6: Final answer
    x = 468.25

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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.