Home / 1,286.80-1,930.75-629.27

Finding the Fourth Proportional to 1,286.80, 1,930.75 and 629.27

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Solution

The fourth proportional to 1,286.80, 1,930.75 and 629.27 is: 944.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.80 : 1,930.75 = 629.27 : x
  2. Step 2: Convert to fraction form
    1,286.80/1,930.75 = 629.27/x
  3. Step 3: Cross multiply
    1,286.80x = 1,930.75 × 629.27
  4. Step 4: Simplify right side
    1,286.80x = 1,214,962.61
  5. Step 5: Solve for x
    x = 1,214,962.61/1,286.80
  6. Step 6: Final answer
    x = 944.17

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1.5x scale

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.