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Finding the Fourth Proportional to 416.38, 574.35 and 291.86

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Solution

The fourth proportional to 416.38, 574.35 and 291.86 is: 402.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.38 : 574.35 = 291.86 : x
  2. Step 2: Convert to fraction form
    416.38/574.35 = 291.86/x
  3. Step 3: Cross multiply
    416.38x = 574.35 × 291.86
  4. Step 4: Simplify right side
    416.38x = 167,629.79
  5. Step 5: Solve for x
    x = 167,629.79/416.38
  6. Step 6: Final answer
    x = 402.59

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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.