Home / 1,259.67-1,884.75-1,131.78

Finding the Fourth Proportional to 1,259.67, 1,884.75 and 1,131.78

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Solution

The fourth proportional to 1,259.67, 1,884.75 and 1,131.78 is: 1,693.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.67 : 1,884.75 = 1,131.78 : x
  2. Step 2: Convert to fraction form
    1,259.67/1,884.75 = 1,131.78/x
  3. Step 3: Cross multiply
    1,259.67x = 1,884.75 × 1,131.78
  4. Step 4: Simplify right side
    1,259.67x = 2,133,112.93
  5. Step 5: Solve for x
    x = 2,133,112.93/1,259.67
  6. Step 6: Final answer
    x = 1,693.39

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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.