Home / 850.20-1,275.50-265.18

Finding the Fourth Proportional to 850.20, 1,275.50 and 265.18

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Solution

The fourth proportional to 850.20, 1,275.50 and 265.18 is: 397.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.20 : 1,275.50 = 265.18 : x
  2. Step 2: Convert to fraction form
    850.20/1,275.50 = 265.18/x
  3. Step 3: Cross multiply
    850.20x = 1,275.50 × 265.18
  4. Step 4: Simplify right side
    850.20x = 338,237.09
  5. Step 5: Solve for x
    x = 338,237.09/850.20
  6. Step 6: Final answer
    x = 397.83

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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.