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Finding the Fourth Proportional to 318.56, 475.41 and 264.56

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Solution

The fourth proportional to 318.56, 475.41 and 264.56 is: 394.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.56 : 475.41 = 264.56 : x
  2. Step 2: Convert to fraction form
    318.56/475.41 = 264.56/x
  3. Step 3: Cross multiply
    318.56x = 475.41 × 264.56
  4. Step 4: Simplify right side
    318.56x = 125,774.47
  5. Step 5: Solve for x
    x = 125,774.47/318.56
  6. Step 6: Final answer
    x = 394.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.