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Finding the Fourth Proportional to 417.31, 575.94 and 251.61

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Solution

The fourth proportional to 417.31, 575.94 and 251.61 is: 347.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.31 : 575.94 = 251.61 : x
  2. Step 2: Convert to fraction form
    417.31/575.94 = 251.61/x
  3. Step 3: Cross multiply
    417.31x = 575.94 × 251.61
  4. Step 4: Simplify right side
    417.31x = 144,912.26
  5. Step 5: Solve for x
    x = 144,912.26/417.31
  6. Step 6: Final answer
    x = 347.25

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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.