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Finding the Fourth Proportional to 416.22, 572.31 and 316.86

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Solution

The fourth proportional to 416.22, 572.31 and 316.86 is: 435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.22 : 572.31 = 316.86 : x
  2. Step 2: Convert to fraction form
    416.22/572.31 = 316.86/x
  3. Step 3: Cross multiply
    416.22x = 572.31 × 316.86
  4. Step 4: Simplify right side
    416.22x = 181,342.15
  5. Step 5: Solve for x
    x = 181,342.15/416.22
  6. Step 6: Final answer
    x = 435.69

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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.