Home / 1,105.60-1,646.40-1,076.80

Finding the Fourth Proportional to 1,105.60, 1,646.40 and 1,076.80

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Solution

The fourth proportional to 1,105.60, 1,646.40 and 1,076.80 is: 1,603.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.60 : 1,646.40 = 1,076.80 : x
  2. Step 2: Convert to fraction form
    1,105.60/1,646.40 = 1,076.80/x
  3. Step 3: Cross multiply
    1,105.60x = 1,646.40 × 1,076.80
  4. Step 4: Simplify right side
    1,105.60x = 1,772,843.52
  5. Step 5: Solve for x
    x = 1,772,843.52/1,105.60
  6. Step 6: Final answer
    x = 1,603.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.