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Finding the Fourth Proportional to 310.15, 428.00 and 170.29

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Solution

The fourth proportional to 310.15, 428.00 and 170.29 is: 234.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.15 : 428.00 = 170.29 : x
  2. Step 2: Convert to fraction form
    310.15/428.00 = 170.29/x
  3. Step 3: Cross multiply
    310.15x = 428.00 × 170.29
  4. Step 4: Simplify right side
    310.15x = 72,883.44
  5. Step 5: Solve for x
    x = 72,883.44/310.15
  6. Step 6: Final answer
    x = 234.99

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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.