Home / 1,408.66-1,941.87-911.26

Finding the Fourth Proportional to 1,408.66, 1,941.87 and 911.26

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Solution

The fourth proportional to 1,408.66, 1,941.87 and 911.26 is: 1,256.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.66 : 1,941.87 = 911.26 : x
  2. Step 2: Convert to fraction form
    1,408.66/1,941.87 = 911.26/x
  3. Step 3: Cross multiply
    1,408.66x = 1,941.87 × 911.26
  4. Step 4: Simplify right side
    1,408.66x = 1,769,548.46
  5. Step 5: Solve for x
    x = 1,769,548.46/1,408.66
  6. Step 6: Final answer
    x = 1,256.19

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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.