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Finding the Fourth Proportional to 310.06, 428.03 and 212.33

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Solution

The fourth proportional to 310.06, 428.03 and 212.33 is: 293.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.06 : 428.03 = 212.33 : x
  2. Step 2: Convert to fraction form
    310.06/428.03 = 212.33/x
  3. Step 3: Cross multiply
    310.06x = 428.03 × 212.33
  4. Step 4: Simplify right side
    310.06x = 90,882.00
  5. Step 5: Solve for x
    x = 90,882.00/310.06
  6. Step 6: Final answer
    x = 293.11

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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.