Home / 1,409.25-1,944.49-911.82

Finding the Fourth Proportional to 1,409.25, 1,944.49 and 911.82

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Solution

The fourth proportional to 1,409.25, 1,944.49 and 911.82 is: 1,258.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.25 : 1,944.49 = 911.82 : x
  2. Step 2: Convert to fraction form
    1,409.25/1,944.49 = 911.82/x
  3. Step 3: Cross multiply
    1,409.25x = 1,944.49 × 911.82
  4. Step 4: Simplify right side
    1,409.25x = 1,773,027.24
  5. Step 5: Solve for x
    x = 1,773,027.24/1,409.25
  6. Step 6: Final answer
    x = 1,258.14

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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.