Home / 1,553.35-2,142.78-923.26

Finding the Fourth Proportional to 1,553.35, 2,142.78 and 923.26

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Solution

The fourth proportional to 1,553.35, 2,142.78 and 923.26 is: 1,273.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.35 : 2,142.78 = 923.26 : x
  2. Step 2: Convert to fraction form
    1,553.35/2,142.78 = 923.26/x
  3. Step 3: Cross multiply
    1,553.35x = 2,142.78 × 923.26
  4. Step 4: Simplify right side
    1,553.35x = 1,978,343.06
  5. Step 5: Solve for x
    x = 1,978,343.06/1,553.35
  6. Step 6: Final answer
    x = 1,273.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.