Home / 1,231.40-1,693.08-1,097.37

Finding the Fourth Proportional to 1,231.40, 1,693.08 and 1,097.37

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Solution

The fourth proportional to 1,231.40, 1,693.08 and 1,097.37 is: 1,508.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.40 : 1,693.08 = 1,097.37 : x
  2. Step 2: Convert to fraction form
    1,231.40/1,693.08 = 1,097.37/x
  3. Step 3: Cross multiply
    1,231.40x = 1,693.08 × 1,097.37
  4. Step 4: Simplify right side
    1,231.40x = 1,857,936.88
  5. Step 5: Solve for x
    x = 1,857,936.88/1,231.40
  6. Step 6: Final answer
    x = 1,508.80

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.