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Finding the Fourth Proportional to 416.44, 574.78 and 285.50

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Solution

The fourth proportional to 416.44, 574.78 and 285.50 is: 394.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.44 : 574.78 = 285.50 : x
  2. Step 2: Convert to fraction form
    416.44/574.78 = 285.50/x
  3. Step 3: Cross multiply
    416.44x = 574.78 × 285.50
  4. Step 4: Simplify right side
    416.44x = 164,099.69
  5. Step 5: Solve for x
    x = 164,099.69/416.44
  6. Step 6: Final answer
    x = 394.05

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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.