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Finding the Fourth Proportional to 313.94, 470.96 and 108.57

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Solution

The fourth proportional to 313.94, 470.96 and 108.57 is: 162.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.94 : 470.96 = 108.57 : x
  2. Step 2: Convert to fraction form
    313.94/470.96 = 108.57/x
  3. Step 3: Cross multiply
    313.94x = 470.96 × 108.57
  4. Step 4: Simplify right side
    313.94x = 51,134.37
  5. Step 5: Solve for x
    x = 51,134.37/313.94
  6. Step 6: Final answer
    x = 162.88

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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.