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Finding the Fourth Proportional to 817.85, 1,227.24 and 355.52

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Solution

The fourth proportional to 817.85, 1,227.24 and 355.52 is: 533.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.85 : 1,227.24 = 355.52 : x
  2. Step 2: Convert to fraction form
    817.85/1,227.24 = 355.52/x
  3. Step 3: Cross multiply
    817.85x = 1,227.24 × 355.52
  4. Step 4: Simplify right side
    817.85x = 436,302.23
  5. Step 5: Solve for x
    x = 436,302.23/817.85
  6. Step 6: Final answer
    x = 533.48

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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.