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Finding the Fourth Proportional to 416.71, 574 and 318.30

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Solution

The fourth proportional to 416.71, 574 and 318.30 is: 438.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.71 : 574 = 318.30 : x
  2. Step 2: Convert to fraction form
    416.71/574 = 318.30/x
  3. Step 3: Cross multiply
    416.71x = 574 × 318.30
  4. Step 4: Simplify right side
    416.71x = 182,704.20
  5. Step 5: Solve for x
    x = 182,704.20/416.71
  6. Step 6: Final answer
    x = 438.44

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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.