Home / 1,911.68-2,640.48-1,649.60

Finding the Fourth Proportional to 1,911.68, 2,640.48 and 1,649.60

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Solution

The fourth proportional to 1,911.68, 2,640.48 and 1,649.60 is: 2,278.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.68 : 2,640.48 = 1,649.60 : x
  2. Step 2: Convert to fraction form
    1,911.68/2,640.48 = 1,649.60/x
  3. Step 3: Cross multiply
    1,911.68x = 2,640.48 × 1,649.60
  4. Step 4: Simplify right side
    1,911.68x = 4,355,735.81
  5. Step 5: Solve for x
    x = 4,355,735.81/1,911.68
  6. Step 6: Final answer
    x = 2,278.49

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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.