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Finding the Fourth Proportional to 417.44, 626.31 and 263.48

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Solution

The fourth proportional to 417.44, 626.31 and 263.48 is: 395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.44 : 626.31 = 263.48 : x
  2. Step 2: Convert to fraction form
    417.44/626.31 = 263.48/x
  3. Step 3: Cross multiply
    417.44x = 626.31 × 263.48
  4. Step 4: Simplify right side
    417.44x = 165,017.03
  5. Step 5: Solve for x
    x = 165,017.03/417.44
  6. Step 6: Final answer
    x = 395.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.