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Finding the Fourth Proportional to 416.28, 574.10 and 305.74

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Solution

The fourth proportional to 416.28, 574.10 and 305.74 is: 421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.28 : 574.10 = 305.74 : x
  2. Step 2: Convert to fraction form
    416.28/574.10 = 305.74/x
  3. Step 3: Cross multiply
    416.28x = 574.10 × 305.74
  4. Step 4: Simplify right side
    416.28x = 175,525.33
  5. Step 5: Solve for x
    x = 175,525.33/416.28
  6. Step 6: Final answer
    x = 421.65

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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.