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Finding the Fourth Proportional to 416.67, 574.43 and 311.91

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Solution

The fourth proportional to 416.67, 574.43 and 311.91 is: 430.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.67 : 574.43 = 311.91 : x
  2. Step 2: Convert to fraction form
    416.67/574.43 = 311.91/x
  3. Step 3: Cross multiply
    416.67x = 574.43 × 311.91
  4. Step 4: Simplify right side
    416.67x = 179,170.46
  5. Step 5: Solve for x
    x = 179,170.46/416.67
  6. Step 6: Final answer
    x = 430.01

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.