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Finding the Fourth Proportional to 310.98, 466.56 and 137.70

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Solution

The fourth proportional to 310.98, 466.56 and 137.70 is: 206.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.98 : 466.56 = 137.70 : x
  2. Step 2: Convert to fraction form
    310.98/466.56 = 137.70/x
  3. Step 3: Cross multiply
    310.98x = 466.56 × 137.70
  4. Step 4: Simplify right side
    310.98x = 64,245.31
  5. Step 5: Solve for x
    x = 64,245.31/310.98
  6. Step 6: Final answer
    x = 206.59

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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.