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Finding the Fourth Proportional to 310.62, 464.85 and 207.75

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Solution

The fourth proportional to 310.62, 464.85 and 207.75 is: 310.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.62 : 464.85 = 207.75 : x
  2. Step 2: Convert to fraction form
    310.62/464.85 = 207.75/x
  3. Step 3: Cross multiply
    310.62x = 464.85 × 207.75
  4. Step 4: Simplify right side
    310.62x = 96,572.59
  5. Step 5: Solve for x
    x = 96,572.59/310.62
  6. Step 6: Final answer
    x = 310.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.