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Finding the Fourth Proportional to 416.78, 574.79 and 354.81

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Solution

The fourth proportional to 416.78, 574.79 and 354.81 is: 489.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.78 : 574.79 = 354.81 : x
  2. Step 2: Convert to fraction form
    416.78/574.79 = 354.81/x
  3. Step 3: Cross multiply
    416.78x = 574.79 × 354.81
  4. Step 4: Simplify right side
    416.78x = 203,941.24
  5. Step 5: Solve for x
    x = 203,941.24/416.78
  6. Step 6: Final answer
    x = 489.33

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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.