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Finding the Fourth Proportional to 318.88, 475.07 and 300.25

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Solution

The fourth proportional to 318.88, 475.07 and 300.25 is: 447.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.88 : 475.07 = 300.25 : x
  2. Step 2: Convert to fraction form
    318.88/475.07 = 300.25/x
  3. Step 3: Cross multiply
    318.88x = 475.07 × 300.25
  4. Step 4: Simplify right side
    318.88x = 142,639.77
  5. Step 5: Solve for x
    x = 142,639.77/318.88
  6. Step 6: Final answer
    x = 447.31

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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.