Home / 1,231.14-1,845.87-646.47

Finding the Fourth Proportional to 1,231.14, 1,845.87 and 646.47

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Solution

The fourth proportional to 1,231.14, 1,845.87 and 646.47 is: 969.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.14 : 1,845.87 = 646.47 : x
  2. Step 2: Convert to fraction form
    1,231.14/1,845.87 = 646.47/x
  3. Step 3: Cross multiply
    1,231.14x = 1,845.87 × 646.47
  4. Step 4: Simplify right side
    1,231.14x = 1,193,299.58
  5. Step 5: Solve for x
    x = 1,193,299.58/1,231.14
  6. Step 6: Final answer
    x = 969.26

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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.