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Finding the Fourth Proportional to 817.72, 1,226.56 and 240.58

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Solution

The fourth proportional to 817.72, 1,226.56 and 240.58 is: 360.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.72 : 1,226.56 = 240.58 : x
  2. Step 2: Convert to fraction form
    817.72/1,226.56 = 240.58/x
  3. Step 3: Cross multiply
    817.72x = 1,226.56 × 240.58
  4. Step 4: Simplify right side
    817.72x = 295,085.80
  5. Step 5: Solve for x
    x = 295,085.80/817.72
  6. Step 6: Final answer
    x = 360.86

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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.