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Finding the Fourth Proportional to 310.70, 465.48 and 261.97

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Solution

The fourth proportional to 310.70, 465.48 and 261.97 is: 392.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.70 : 465.48 = 261.97 : x
  2. Step 2: Convert to fraction form
    310.70/465.48 = 261.97/x
  3. Step 3: Cross multiply
    310.70x = 465.48 × 261.97
  4. Step 4: Simplify right side
    310.70x = 121,940.63
  5. Step 5: Solve for x
    x = 121,940.63/310.70
  6. Step 6: Final answer
    x = 392.47

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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.