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Finding the Fourth Proportional to 316.79, 475.72 and 276.56

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Solution

The fourth proportional to 316.79, 475.72 and 276.56 is: 415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.79 : 475.72 = 276.56 : x
  2. Step 2: Convert to fraction form
    316.79/475.72 = 276.56/x
  3. Step 3: Cross multiply
    316.79x = 475.72 × 276.56
  4. Step 4: Simplify right side
    316.79x = 131,562.05
  5. Step 5: Solve for x
    x = 131,562.05/316.79
  6. Step 6: Final answer
    x = 415.30

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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.