Home / 850.20-1,275.39-287.13

Finding the Fourth Proportional to 850.20, 1,275.39 and 287.13

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Solution

The fourth proportional to 850.20, 1,275.39 and 287.13 is: 430.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.20 : 1,275.39 = 287.13 : x
  2. Step 2: Convert to fraction form
    850.20/1,275.39 = 287.13/x
  3. Step 3: Cross multiply
    850.20x = 1,275.39 × 287.13
  4. Step 4: Simplify right side
    850.20x = 366,202.73
  5. Step 5: Solve for x
    x = 366,202.73/850.20
  6. Step 6: Final answer
    x = 430.73

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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.