Home / 1,408.55-1,943.16-911.35

Finding the Fourth Proportional to 1,408.55, 1,943.16 and 911.35

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Solution

The fourth proportional to 1,408.55, 1,943.16 and 911.35 is: 1,257.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.55 : 1,943.16 = 911.35 : x
  2. Step 2: Convert to fraction form
    1,408.55/1,943.16 = 911.35/x
  3. Step 3: Cross multiply
    1,408.55x = 1,943.16 × 911.35
  4. Step 4: Simplify right side
    1,408.55x = 1,770,902.74
  5. Step 5: Solve for x
    x = 1,770,902.74/1,408.55
  6. Step 6: Final answer
    x = 1,257.25

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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.