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Finding the Fourth Proportional to 313.95, 470.31 and 205.41

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Solution

The fourth proportional to 313.95, 470.31 and 205.41 is: 307.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.95 : 470.31 = 205.41 : x
  2. Step 2: Convert to fraction form
    313.95/470.31 = 205.41/x
  3. Step 3: Cross multiply
    313.95x = 470.31 × 205.41
  4. Step 4: Simplify right side
    313.95x = 96,606.38
  5. Step 5: Solve for x
    x = 96,606.38/313.95
  6. Step 6: Final answer
    x = 307.71

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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.