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Finding the Fourth Proportional to 416.79, 574.83 and 318.39

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Solution

The fourth proportional to 416.79, 574.83 and 318.39 is: 439.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.79 : 574.83 = 318.39 : x
  2. Step 2: Convert to fraction form
    416.79/574.83 = 318.39/x
  3. Step 3: Cross multiply
    416.79x = 574.83 × 318.39
  4. Step 4: Simplify right side
    416.79x = 183,020.12
  5. Step 5: Solve for x
    x = 183,020.12/416.79
  6. Step 6: Final answer
    x = 439.12

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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.