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Finding the Fourth Proportional to 310.85, 468.12 and 270.75

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Solution

The fourth proportional to 310.85, 468.12 and 270.75 is: 407.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.85 : 468.12 = 270.75 : x
  2. Step 2: Convert to fraction form
    310.85/468.12 = 270.75/x
  3. Step 3: Cross multiply
    310.85x = 468.12 × 270.75
  4. Step 4: Simplify right side
    310.85x = 126,743.49
  5. Step 5: Solve for x
    x = 126,743.49/310.85
  6. Step 6: Final answer
    x = 407.73

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.