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Finding the Fourth Proportional to 1,284.20, 1,772.19 and 694.73

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Solution

The fourth proportional to 1,284.20, 1,772.19 and 694.73 is: 958.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.20 : 1,772.19 = 694.73 : x
  2. Step 2: Convert to fraction form
    1,284.20/1,772.19 = 694.73/x
  3. Step 3: Cross multiply
    1,284.20x = 1,772.19 × 694.73
  4. Step 4: Simplify right side
    1,284.20x = 1,231,202.44
  5. Step 5: Solve for x
    x = 1,231,202.44/1,284.20
  6. Step 6: Final answer
    x = 958.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.