Home / 1,286.34-1,928.89-636.31

Finding the Fourth Proportional to 1,286.34, 1,928.89 and 636.31

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Solution

The fourth proportional to 1,286.34, 1,928.89 and 636.31 is: 954.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.34 : 1,928.89 = 636.31 : x
  2. Step 2: Convert to fraction form
    1,286.34/1,928.89 = 636.31/x
  3. Step 3: Cross multiply
    1,286.34x = 1,928.89 × 636.31
  4. Step 4: Simplify right side
    1,286.34x = 1,227,372.00
  5. Step 5: Solve for x
    x = 1,227,372.00/1,286.34
  6. Step 6: Final answer
    x = 954.16

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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.