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Finding the Fourth Proportional to 416.69, 574.81 and 318.28

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Solution

The fourth proportional to 416.69, 574.81 and 318.28 is: 439.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.69 : 574.81 = 318.28 : x
  2. Step 2: Convert to fraction form
    416.69/574.81 = 318.28/x
  3. Step 3: Cross multiply
    416.69x = 574.81 × 318.28
  4. Step 4: Simplify right side
    416.69x = 182,950.53
  5. Step 5: Solve for x
    x = 182,950.53/416.69
  6. Step 6: Final answer
    x = 439.06

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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.