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Finding the Fourth Proportional to 834.75, 1,252.25 and 287.09

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Solution

The fourth proportional to 834.75, 1,252.25 and 287.09 is: 430.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.75 : 1,252.25 = 287.09 : x
  2. Step 2: Convert to fraction form
    834.75/1,252.25 = 287.09/x
  3. Step 3: Cross multiply
    834.75x = 1,252.25 × 287.09
  4. Step 4: Simplify right side
    834.75x = 359,500.76
  5. Step 5: Solve for x
    x = 359,500.76/834.75
  6. Step 6: Final answer
    x = 430.67

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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.