Home / 1,290.83-1,936.65-633.11

Finding the Fourth Proportional to 1,290.83, 1,936.65 and 633.11

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Solution

The fourth proportional to 1,290.83, 1,936.65 and 633.11 is: 949.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.83 : 1,936.65 = 633.11 : x
  2. Step 2: Convert to fraction form
    1,290.83/1,936.65 = 633.11/x
  3. Step 3: Cross multiply
    1,290.83x = 1,936.65 × 633.11
  4. Step 4: Simplify right side
    1,290.83x = 1,226,112.48
  5. Step 5: Solve for x
    x = 1,226,112.48/1,290.83
  6. Step 6: Final answer
    x = 949.86

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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.