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Finding the Fourth Proportional to 850.82, 1,275.98 and 357.21

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Solution

The fourth proportional to 850.82, 1,275.98 and 357.21 is: 535.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.82 : 1,275.98 = 357.21 : x
  2. Step 2: Convert to fraction form
    850.82/1,275.98 = 357.21/x
  3. Step 3: Cross multiply
    850.82x = 1,275.98 × 357.21
  4. Step 4: Simplify right side
    850.82x = 455,786.24
  5. Step 5: Solve for x
    x = 455,786.24/850.82
  6. Step 6: Final answer
    x = 535.71

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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.