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Finding the Fourth Proportional to 416.67, 574.11 and 285.45

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Solution

The fourth proportional to 416.67, 574.11 and 285.45 is: 393.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.67 : 574.11 = 285.45 : x
  2. Step 2: Convert to fraction form
    416.67/574.11 = 285.45/x
  3. Step 3: Cross multiply
    416.67x = 574.11 × 285.45
  4. Step 4: Simplify right side
    416.67x = 163,879.70
  5. Step 5: Solve for x
    x = 163,879.70/416.67
  6. Step 6: Final answer
    x = 393.31

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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.