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Finding the Fourth Proportional to 473.97, 654.18 and 318.63

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Solution

The fourth proportional to 473.97, 654.18 and 318.63 is: 439.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.97 : 654.18 = 318.63 : x
  2. Step 2: Convert to fraction form
    473.97/654.18 = 318.63/x
  3. Step 3: Cross multiply
    473.97x = 654.18 × 318.63
  4. Step 4: Simplify right side
    473.97x = 208,441.37
  5. Step 5: Solve for x
    x = 208,441.37/473.97
  6. Step 6: Final answer
    x = 439.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.